Just from looking at the social groups it seems to be what I'm looking for, however I wanted to clarify to make sure.
I own a roleplay forum and the purpose would be to allow users to make roleplay groups and essentially have their ow nboards they can moderate on their own and allow/not allow users to enter and all.
-> Can members still report threads/posts in groups?
-> Do threads and posts made within groups not go to the total of the forum?
-> Can you restrict how many groups a member group can make? 
-> Will our ads appear on the groups? They are simply put in with simple adds and are in the footer and below the menu

1. No.
2. No, they don't count.
3. No, but it could be done easily.
4. Yes.