May I join an already existing chat room (e.g. the Logic one) and invite another user to talk ?
If so, how ?
What the Chat FAQ says about inviting is interesting but not explicit:
If you need to invite someone to your room, do it from the user's chat profile page or from the user card that pops up when you click on their avatar in a chat room.
I assumed this meant searching for a user from the Chat Users page. Although I drilled down to find myself, this did not immediately suggest to me a mechanism for issuing an invitation.