Is there a social group mod for IPB?
I know VBulletin has one, but does IPB?
For those who don't know what I'm talking about, it's sort of like a club system. You can choose to have it invite only, or anyone can join, or people must be moderated to join. You set up clubs to talk about specific subjects, and have get-togethers with the other members. It makes it easier than posting a topic for a club meeting or group meeting in the forums, and everyone spamming it.
It'd be great for say a ton of people who have interest in sports, so they can discuss games and such with other sports lovers.
It wouldn't slow down the forums too much, as the GENERAL subjects, such as "sports in general," would take place in the forums, but more in depth discussion could happen in the groups.
Plus people could use them to organize projects they are working on in secret with a group. It would be safe, as moderators can still check all groups, and would be a huge help to those who don't have messengers.
That's a very vague description of it, but hopefully you get the idea.