This is a place where we could collect list of chat rooms associated with this site. There are several rooms which have potential to be useful if more users were aware of them or more users visited them. Collecting a list of such rooms here could increase their visibility. This was previously discussed on meta and gained some support: Would list of chat rooms (and chat room suggestions) be useful?
If you have some chat room which is meant to be "public" and "for the long run", please add it as an answer. (I.e., rooms worth adding here are the rooms which are not created to deal with a single problem or to continue a specific conversation about and particular problem).
In particular, we could list rooms:
- Devoted to specific area of mathematics
- Reading groups and study groups
- Administrative and janitorial rooms (related to site moderating and maintenance rather than to some mathematical topics)
Of course, if some room deserves to be described in more detail in a separate answer, do not hesitate to add it.