After several months of attempts, I actually went to the TER room when there were people in it. I had a good time chatting, and would like to do more.

I would suggest to staff that they modify the main banner of the site to give a current status of the rooms. That way I could see right away if someone was there, or the first person in could hang out for a little while and everyone on the site would see right away that there was someone available to chat with.