BuddyPress.org

Functionality:

If a user is not member of a Group, but are invited to an event attached to that Group, they’ll get an invite to the Group but no invite to the event. That might be intended, but just in case. This also means that any friend of the Group creator can be invited to an Event attached to a Group, even if they don’t belong to the Group.

Optimal functionality would, I think, be the ability to just override the filter that shows us who we can invite (ie don’t filter to friends, user-choice on the fly). If someone is invited to a Group-attached event, then optimally, they’d receive an invite to the Group and an invite to the Event if they don’t already belong to the Group.