A recent meta discussion made me interested in seeing what chat rooms were available. I remember seeing a few rooms, but not being interested in having discussions in those rooms. Now, I can't seem to find any of those rooms. 

How do I access a chat room through the UI? 

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https://chat.stackexchange.com/?tab=site&sort=active&host=salesforce.stackexchange.com 

This is a link to the active rooms, which are mostly discussions generated from the auto-chat link. Have tag based chat rooms or discussion rooms been tried in the past on SF.SE?