a list of all rooms, recently active rooms first
General discussion about http://codereview.stackexchange.com/ - Welcome to The 2nd Monitor! http://meta.codereview.stackexchange.com/questions/5967/welcome-to-the-2nd-monitor - Site Business always comes first
Previously a testing chamber for @Smelly. Now HQ for @IPSCommentBot and @IPSMetaCommentBot (source code for both: https://github.com/thesecretmaster/ips-comment-bot)
Gallery room. Feel free to request write access if you read SQL Server CU fixes for fun. 🤔🤔🤔 Interrogate Erik, Friday at noon EST: https://www.youtube.com/channel/UCGKoa4FuG7kI3rKnzhgGPeQ 🤔🤔🤔
Where all questions are always on-topic. And all answers always incomprehensible. And everything that is not forbidden is compulsory.
For feedback/discussion/requests of Close/Reopen/Undelete/Delete/Edit for questions and answers on Math SE (for Math Meta stuff go to https://chat.stackexchange.com/rooms/64952/math-meta-chat instead)
Discussion forum for https://3dprinting.stackexchange.com/
Practice your Jelly :) To be a student, request access. Rules and stuff are here: https://golfingsuccess.github.io/jelly-hypertraining/
This is the main chat room for English Language Learners Stack Exchange. Welcome!
Associated with Math.SE; for both general discussion & math questions alike. Just ask; don't ask to ask. Rarely if ever expressible as a ratio of integers. Chat guidelines: http://tinyurl.com/hzl2955 | $\LaTeX$ in chat: http://tinyurl.com/cfqcvpc
For discussion about programming, math, linguistics, science, and related topics. Not about PPCG (the site itself) or golfing.
General chat for Physics SE (https://physics.stackexchange.com/). For MathJax see https://meta.stackexchange.com/a/220976. Don't ask about asking, just ask.
For playing the game Spyfall. Join/create games here: http://spyfall.crabhat.com More info here: https://puzzling.meta.stackexchange.com/a/5991
For playing the game Zendo, where players compete to guess a hidden rule.
General discussion for https://codegolf.stackexchange.com | Guidelines: https://ppcg.github.io/chatiquette/
For any discussions about general topology. For instructions how to render MathJax(TeX) in chat see http://meta.math.stackexchange.com/a/3297 "Sets are not doors"