I have no experience with "chat", but today I got an "invitation", then I entered the chat-room: three members, two of them do not know what they should do there/why they were "invited" ("Why is $\beta$ in $Q$") - and me: the third (except of the owner). Looking at the user "Mary Star" I found she has about 80 Chat-rooms, many of the same name and also three of the chat-title where I was now invited.
Is there something how one can help the user to manage the chatting properly? Or is this (look at the user's site for chatrooms) really the intended behave? (And finally: there was not even an input-line for me in that "chat")
see the user's chat-list http://chat.stackexchange.com/users/119089/mary-star
See the chat-room: http://chat.stackexchange.com/transcript/32572