My users are asking for "chat", but I suspect they mean one on one IM rather than multi-uer chat rooms.
If there is no negative interaction, I could offer both.
There seem to be a few available, so I will just install them all and try them out one by one, unless someone can make a recommendation.
I need something stable for Drupal 7, easy to use for non-sophisticated users (although they all use IM & FB and the like).
We have Organic Groups so anything that can leverage that somehow might be a bonus.
Update: I am not asking what is "best". I am asking what is stable, well supported, easy to install and administer and easy for unsophisticated users. I ought to have made that clearer before. I just want to cut down my search list.
Review: Drupal Chat has a live demo, so try it out.
There is a small grey box labelled "Chat" permanently at the bottom of the screen, showing the number of on-line users. Clicking reveals a list of users, clicking one begins chat (whether the other user likes it or not).
Options are currently in progress (i.e. none).
User is not informed when partner disconnects and just keeps typing, getting no reply. "go idle/go online" has no effect.
User can chat, but that 's all. Still very much a work in progress as at Nov 2011.