a list of all rooms, recently active rooms first
Discussion about the Julia language and golfing in it — http://julialang.org
General chat for Physics Stack Exchange (http://physics.stackexchange.com/). For MathJax see https://meta.stackexchange.com/a/220976
General on- and off-site discussion for http://dba.stackexchange.com
Main chat room for http://worldbuilding.stackexchange.com
A room intended for discussing non-specific puzzles, or working together. We try, at least.
This is the main chat room for English Language Learners Stack Exchange. Welcome!
Discussion specific to golfing code. For general PPCG chatter use The Nineteenth Byte.
Haikus are awesome / Chemistry's even better / So pull up a chair
Welcome! This is the main Mathematica chat room for http://mathematica.stackexchange.com/. Other than the general guidelines (http://chat.stackexchange.com/faq) in place, anything goes here. Feel free to discuss most things.
General discussion for http://movies.stackexchange.com
A place to talk with friends from the EE community about vacuum nanotubes ... and beer..
General Arqade chat, wherein we accept your right to be wrong on the internet, but also like to be wrong on the internet, so occasionally we're wrong on the internet about your wrong on the internet, and that's also okay? It made sense at the time.
General discussion for http://ru.stackoverflow.com
Normally: General discussion around Ask Ubuntu, Ubuntu & official Ubuntu derivatives. For other Linux distros please see: http://chat.stackexchange.com/rooms/26/dev-chat
General Discussion for http://programmers.stackexchange.com Pants optional when telecommuting.
General discussion for http://matheducators.stackexchange.com