I can't remember the name of the group, but there is a group in St Louis. Just google "scooter clubs st louis".
I think they mostly cater to folks with bigger maxi scoots though. So depending on what you ride, you might look them up.
If you're on a 150 or smaller, like me, they might not have much to offer for you.
I haven't heard of any others in the area. If you hear of any others, please post about them for those of us in the area!