BuddyPress.org

Actually, this site is a good example of what I’m looking for. Some of the plugin groups have forums and some do not.

Here’s a plugin without a forum: https://buddypress.org/community/groups/wibstats-statistics-for-wordpress-mu/

How would I disable forums for certain groups on a normal BP site? Basically I want forums for groups to be disabled by default, but then to be able to activate forums for groups on a case-by-case basis.