Is (or would) it be possible to assign SO tags to chat rooms in order to indicate what is the focus of particular room?
I'm completely in favor of this proposal, if only to help alleviate the problem which is worse than duplicate questions: duplicate chat rooms. It would be one thing if there were enough traffic to maintain eight rooms, but there isn't. I think that a viable solution to the problem of duplicate Android chat rooms.
Also on the topic of duplicate chat rooms, perhaps the mods should (or should have, initially?) open(ed) a chat room per language. I think that I would be sufficient to have one for C, one for C++, one for Java, .NET, one for each of the major mobile platforms and one for the "other" languages.
Another option is to rais the minimum rep required to open a chat room on SO. Other sites are perhaps less likely to run into duplicates, but SO chat room opening "powers" have obviously been abused.
So... I agree with this proposal, along with some of my other suggestions. Lets make chat more active by keeping dupe rooms from opening and spreading conversation too thin.
Just to clarify:
I suggest this for StackOverflow, but creating a set of rooms on another stackexchange site may well be a terrible idea. I refer specifically to StackOverflow where this issue needs to be addressed.