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  • November 2025

  • Thu 27
    Cartoon image of a smiling tofu cube with red cheeks and green onion on its head Credit to Vecteezy (vecteezy.com)
    November 27

    🍴 Closed November 27th

    Iffy Books 404 S. 20th St., Philadelphia, United States

    We'll be closed on Thursday, November 27th. But we'll be here on Friday!

  • Sat 29
    Flyer with 6 LED lights attached to a Pi Pico development board, with the following text: Pico LED Hourglass Workshop βŒ› Iffy Books A programmable timer for writing, cooking, games, etc.!
    November 29 @ 10:30 am - 12:30 pm ⏳ Pico LED Hourglass Workshop

    ⏳ Pico LED Hourglass Workshop

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Learn to make a programmable game timer and dice with a Pi Pico microcontroller! First you’ll solder six LEDs, two switches, and a vibration motor to the board’s GPIO pins. […]

  • Sun 30
    A one-time pad encoder/decoder sheet, with two 36x36 grids of letters and numbers, with the following text at the bottom right: There's no space character, so we'll use 0 (zero) instead. When digits appear in your cleartext message, skip the surrounding Os that would normally indicate spaces. Examples: MEETOATOPARK7PM CALLOCASEY2156823032 Pad the end of your message with Os to obscure the length. If your message ends with a digit, you can pad the beginning instead to avoid ambiguity. ALLOCLEAROFORONOW000 (padded to 20 characters)
    November 30 @ 10:30 am - 11:30 am πŸ—’οΈ One-Time Pad Encryption Workshop

    πŸ“ One-Time Pad Encryption Workshop

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Join us for a workshop on one-time pad encryption! We'll walk you through a technique for sending truly private messages without a computer, using 6-sided dice to generate random numbers. […]

  • Sun 30
    A king penguin head. Photo taken at Edinburgh Zoo, Scotland.
    November 30 @ 11:30 am - 12:30 pm 🐧 Linux Lab

    🐧 E-Z Command-Line Encryption with OpenSSL

    Iffy Books 404 S. 20th St., Philadelphia, United States

    At this workshop you'll learn to create passphrase-protected files using OpenSSL, a command-line program that's probably already installed on your computer. With this technique you can send encrypted files via […]

  • December 2025

  • Tue 2
    Flyer with a green background and the following text: The Writing Room @ Iffy Books / Every Tuesday 5-7:30 PM / Come co-work with other writers in three 4-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer chargers, notepads, etc.
    December 2 @ 5:00 pm - 7:30 pm ✏️ The Writing Room

    ✏️ The Writing Room

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Come co-work with other writers in three 40-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer […]

  • Wed 3
    The cover of 'Planetes Book 1' by Makoto Yukimura, with an illustration of a circular porthole in a spaceship with the Earth below filling the view
    December 3 @ 7:00 pm - 8:30 pm πŸͺ Speculative Futures Reading Group

    πŸͺ Speculative Futures Reading Group: ‘Planetes Book 1’ by Makoto Yukimura

    Iffy Books 404 S. 20th St., Philadelphia, United States

    The Speculative Futures Reading Group meets on the last Wednesday of every month at 7 p.m.! This month we're discussing Planetes Book 1 by Makoto Yukimura. (Illustrated by Makoto Yukimura, […]

  • Thu 4
    Flyer with an icon of a laptop and the following text in pink outlined with green: FAFIO meetup fuck around and figure it out!
    December 4 @ 6:30 pm - 8:30 pm πŸ€” FAFIO Meetup

    πŸ€” FAFIO Meetup

    Iffy Books 404 S. 20th St., Philadelphia, United States

    FAFIO is a new meetup for folks who want to learn new tech skills but aren't sure where to start. Let's fuck around and figure it out! Feel free to […]

  • Fri 5
    Picture of Benjamin Franklin wearing sunglasses in green on a black background. Parts of his face and clothes look like a circuit board. At the bottom it says "B-Sides Philadelphia"
    December 5 @ 11:00 am - 5:00 pm

    🎲 B-Sides Philly

    Iffy Books 404 S. 20th St., Philadelphia, United States

    See y'all at B-Sides!

  • Sat 6
    Image with the following words in different fonts, colors, and angles: Make a hand-coded *holiday* SVG e-card
    December 6 @ 10:30 am - 12:00 pm 🎊 Make a Hand-Coded SVG Holiday E-Card

    🎊 Make a Hand-Coded SVG Holiday E-Card

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Learn to make an animated SVG file using a plaintext editor and web browser. No fancy tools needed! Geany text editor Register

  • Sun 7
    Image with the following words in different fonts, colors, and angles: Make a hand-coded *holiday* SVG e-card
    December 7 @ 10:30 am - 12:00 pm 🎊 Make a Hand-Coded SVG Holiday E-Card

    🎊 Make a Hand-Coded SVG Holiday E-Card

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Learn to make an animated SVG file using a plaintext editor and web browser. No fancy tools needed! Geany text editor Register

  • Sun 7
    '80s style pink glowing text reading "Homebrew Website Club" with a purple triangle and rainbow and grid receding into the background
    December 7 @ 6:00 pm - 8:00 pm 🏠 IndieWeb Homebrew Website Club

    🏠 IndieWeb Homebrew Website Club

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Homebrew Website Club is a growing world-wide network of meetups for everyone who wants to take back their web experience from social media silos, and own their online identities & […]

  • Tue 9
    Flyer with a green background and the following text: The Writing Room @ Iffy Books / Every Tuesday 5-7:30 PM / Come co-work with other writers in three 4-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer chargers, notepads, etc.
    December 9 @ 5:00 pm - 7:30 pm ✏️ The Writing Room

    ✏️ The Writing Room

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Come co-work with other writers in three 40-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer […]

  • Thu 11
    The cover of a recent edition of 'Technics and Civilization' by Lewis Mumford, with blue and yellow overlapping circles superimposed on a photo from the '30s(?) of a train with a giant propeller on the front, with two people standing nearby
    December 11 @ 6:30 pm - 8:30 pm βš™οΈ Neo-Luddite Reading Group

    βš™οΈ Neo-Luddite Reading Group: ‘Technics and Civilization’ by Lewis Mumford

    Iffy Books 404 S. 20th St., Philadelphia, United States

    ➑️ Virtual Meetup Link Discord: Email neoluddite@victorgom.es for an invite! Full schedule: victorgom.es/neoluddite If you're joining for the first time, I'd suggest you read this before anything else for brief […]

  • Fri 12
    Animated GIF of a small circuit board with two blinking LED lights, two transistors, two capacitors, and four resistors
    December 12 @ 1:00 pm - 2:00 pm ⚑️ Beginner Soldering: Flashing LED Circuit

    ⚑️ Beginner Soldering: Flashing LED Circuit

    Iffy Books 404 S. 20th St., Philadelphia, United States

    In this workshop you'll learn the basics of soldering by building a tiny oscillator circuit with two transistors and two LED lights. No previous experience needed! Register:  

  • Sat 13
    A drawing of two smiling turtles facing each other, with a wi-fi symbol over their heads. One is wearing a cowboy hat and the other is wearing a little bowler. Both turtles have computers on their backs. The text "Model Internet Club" is at the bottom in a typewriter font.
    December 13 @ 10:30 am - 12:30 pm πŸš‚ Model Internet Club

    πŸš‚ Model Internet Club

    Iffy Books 404 S. 20th St., Philadelphia, United States

    The Model Internet Club is back! Join us every third Saturday from 10:30 a.m. to 12:30 p.m. for an informal meetup focused on building small-scale computer networks. No registration needed […]

  • Sun 14
    Closeup photo of a zine with the title "Draw with code! An intro to turtle graphics using Python." There's a turtle icon on the middle of the cover with a zig-zagging line coming out of its tail, and several lines of code on the left, such as "left(90)" and "forward(10)." Text on the right says "free zine!" The Iffy Books logo and address (319 N. 11th St. 2I, PHL) are at the bottom right corner.
    December 14 @ 10:30 am - 1:30 pm Private: 🐒 Draw with code! An intro to turtle graphics using Python

    🐒 Draw with code! An intro to turtle graphics using Python

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Drop in any time from 10:30 a.m. to 1:30 p.m. and learn to draw cool geometric pictures using Python! It's just like Logo, the turtle drawing program that introduced a […]

  • Tue 16
    Flyer with a green background and the following text: The Writing Room @ Iffy Books / Every Tuesday 5-7:30 PM / Come co-work with other writers in three 4-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer chargers, notepads, etc.
    December 16 @ 5:00 pm - 7:30 pm ✏️ The Writing Room

    ✏️ The Writing Room

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Come co-work with other writers in three 40-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer […]

  • Wed 17
    Pi Pico Development board with red and black wires running to a USB port, attached to the Pico with twist tie wire
    December 17 @ 1:00 pm - 3:00 pm πŸ”„ Solder & Code: Pico Power Cycler

    πŸ”„ Solder & Code: Pico Power Cycler

    Iffy Books 404 S. 20th St., Philadelphia, United States

    In this workshop you'll build a gadget that turns power on and off for a USB-powered device. Useful for rebooting solar-powered radios, making decorations blink, etc. No experience with soldering […]

  • Wed 17
    A photo of CIA headquarters: a wide office building with a retro concrete awning and a large lawn
    December 17 @ 7:00 pm - 8:30 pm πŸ‘οΈ Intelligence History Reading Group: ‘Agents of Subversion’ by

    πŸ‘οΈ Intelligence History Reading Group

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Stay tuned for details!

  • Thu 18
    Pi Pico Development board with red and black wires running to a USB port, attached to the Pico with twist tie wire
    December 18 @ 1:00 pm - 3:00 pm πŸ”„ Solder & Code: Pico Power Cycler

    πŸ”„ Solder & Code: Pico Power Cycler

    Iffy Books 404 S. 20th St., Philadelphia, United States

    In this workshop you'll build a gadget that turns power on and off for a USB-powered device. Useful for rebooting solar-powered radios, making decorations blink, etc. No experience with soldering […]

  • Fri 19
    Animated GIF of a small circuit board with two blinking LED lights, two transistors, two capacitors, and four resistors
    December 19 @ 1:00 pm - 2:00 pm ⚑️ Beginner Soldering: Flashing LED Circuit

    ⚑️ Beginner Soldering: Flashing LED Circuit

    Iffy Books 404 S. 20th St., Philadelphia, United States

    In this workshop you'll learn the basics of soldering by building a tiny oscillator circuit with two transistors and two LED lights. No previous experience needed! Register:  

  • Thu 25
    Super close macro photo of a snowflake. CC-BY Alexey Kljatov https://www.flickr.com/photos/chaoticmind75/46796797182/
    December 25 @ 8:00 am - 5:00 pm

    ❄️ Closed December 25th

    Iffy Books 404 S. 20th St., Philadelphia, United States

    We'll be closed on December 25th. Sorry for the inconvenience! Photo CC-BY Alexey Kljatov

  • Sat 27
    Flyer with a pink toy keyboard in the background and the following text: Toy Quieting Workshop December 27 & 28 10:30 AM – 12:30 PM 404 S. 20th St., PHL
    December 27 @ 10:30 am - 12:30 pm 🧸 Toy Quieting Workshop

    🧸 Toy Quieting Workshop

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Is there a toy in your house that’s so loud it’s driving you up a wall? Are you just curious about electronics and sound? Join us for a hands-on workshop […]

  • Sun 28
    Flyer with a pink toy keyboard in the background and the following text: Toy Quieting Workshop December 27 & 28 10:30 AM – 12:30 PM 404 S. 20th St., PHL
    December 28 @ 10:30 am - 12:30 pm 🧸 Toy Quieting Workshop

    🧸 Toy Quieting Workshop

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Is there a toy in your house that’s so loud it’s driving you up a wall? Are you just curious about electronics and sound? Join us for a hands-on workshop […]

  • Wed 31
    An artist's rendering of a black hole, with a large patch of bright white light on the right side and a dimmer area of light on the left.
    December 31 @ 7:00 pm - 8:30 pm πŸͺ Speculative Futures Reading Group

    πŸͺ Speculative Futures Reading Group

    Iffy Books 404 S. 20th St., Philadelphia, United States

    The Speculative Futures Reading Group meets on the last Wednesday of every month at 7 p.m.!

  • January 2026

  • Thu 1
    Flyer with an icon of a laptop and the following text in pink outlined with green: FAFIO meetup fuck around and figure it out!
    January 1, 2026 @ 6:30 pm - 8:30 pm πŸ€” FAFIO Meetup

    πŸ€” FAFIO Meetup

    Iffy Books 404 S. 20th St., Philadelphia, United States

    FAFIO is a new meetup for folks who want to learn new tech skills but aren't sure where to start. Let's fuck around and figure it out! Feel free to […]

  • Sat 3
    Price tag with a photo of an ESP32 microcontroller, an LED screen that reads "useful info here :)" and the following text: ESP32 Breadboard Display Kit Connect to wi-fi and display weather, headlines, or transit times on a 1-inch screen! β€’ ESP32 board w/ USB-C port β€’ 0.96" OLED screen β€’ 400 tie point breadboard β€’ 3 push buttons β€’ screw terminal for power/audio β€’ 1 meter single core jumper wire β€’ mini wire cutter/stripper tool πŸ’­ Details and examples at iffybooks.net/esp32-breadboard-display
    January 3, 2026 @ 10:30 am - 12:30 pm 🌀️ Breadboard Weather Display Workshop

    🌀️ Breadboard Weather Display Workshop

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Learn to connect an ESP32 microcontroller and an OLED screen on a breadboard to make a web-connected weather display! Register coming soon!

  • Sun 4
    Price tag with a photo of an ESP32 microcontroller, an LED screen that reads "useful info here :)" and the following text: ESP32 Breadboard Display Kit Connect to wi-fi and display weather, headlines, or transit times on a 1-inch screen! β€’ ESP32 board w/ USB-C port β€’ 0.96" OLED screen β€’ 400 tie point breadboard β€’ 3 push buttons β€’ screw terminal for power/audio β€’ 1 meter single core jumper wire β€’ mini wire cutter/stripper tool πŸ’­ Details and examples at iffybooks.net/esp32-breadboard-display
    January 4, 2026 @ 10:30 am - 12:30 pm 🌀️ Breadboard Weather Display Workshop

    🌀️ Breadboard Weather Display Workshop

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Learn to connect an ESP32 microcontroller and an OLED screen on a breadboard to make a web-connected weather display! Register coming soon!

  • Sun 4
    Pi Pico Development board with red and black wires running to a USB port, attached to the Pico with twist tie wire
    January 4, 2026 @ 10:30 am - 12:30 pm πŸ”„ Solder & Code: Pico Power Cycler

    πŸ”„ Solder & Code: Pico Power Cycler

    Iffy Books 404 S. 20th St., Philadelphia, United States

    In this workshop you'll build a gadget that turns power on and off for a USB-powered device. Useful for rebooting solar-powered radios, making decorations blink, etc. No experience with soldering […]

  • Sun 4
    '80s style pink glowing text reading "Homebrew Website Club" with a purple triangle and rainbow and grid receding into the background
    January 4, 2026 @ 6:00 pm - 8:00 pm 🏠 IndieWeb Homebrew Website Club

    🏠 IndieWeb Homebrew Website Club

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Homebrew Website Club is a growing world-wide network of meetups for everyone who wants to take back their web experience from social media silos, and own their online identities & […]

  • Tue 6
    Flyer with a green background and the following text: The Writing Room @ Iffy Books / Every Tuesday 5-7:30 PM / Come co-work with other writers in three 4-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer chargers, notepads, etc.
    January 6, 2026 @ 5:00 pm - 7:30 pm ✏️ The Writing Room

    ✏️ The Writing Room

    Iffy Books 404 S. 20th St., Philadelphia, United States

    Come co-work with other writers in three 40-minute units of silent writing. Writers and projects of any type welcome. 10-minute breaks and accountability check-ins between units. BYO coffee, water, computer […]

  • Wed 7
    The symbol of the permacomputing movement, a pixel art flower 7 pixels wide and 9 pixels tall, in white on a black background.
    January 7, 2026 @ 6:30 pm - 8:00 pm πŸ’Ύβ˜€οΈ Permacomputing + Solarpunk Meetup

    πŸ’Ύβ˜€οΈ Permacomputing + Solarpunk Meetup

    Iffy Books 404 S. 20th St., Philadelphia, United States

    The Permacomputing + Solarpunk meetup is the first Wednesday every other monthΒ at Iffy Books! You can join us in person (404 S. 20th St., PHL) or remotely via Jitsi Meet. […]

  • Sat 10
    A drawing of two smiling turtles facing each other, with a wi-fi symbol over their heads. One is wearing a cowboy hat and the other is wearing a little bowler. Both turtles have computers on their backs. The text "Model Internet Club" is at the bottom in a typewriter font.
    January 10, 2026 @ 10:30 am - 12:30 pm πŸš‚ Model Internet Club

    πŸš‚ Model Internet Club

    Iffy Books 404 S. 20th St., Philadelphia, United States

    The Model Internet Club is back! Join us every third Saturday from 10:30 a.m. to 12:30 p.m. for an informal meetup focused on building small-scale computer networks. No registration needed […]

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