Clubs for young adults

I’m looking to get more involved in local clubs and activities. I have a few connections with rodeo committees, but since I’m not 21, I can’t join those just yet. I’m new to the area, so I’m hoping for some advice on sports leagues, running groups, or young professional organizations that don’t have strict age requirements. For context, I was in college as a student-athlete (basketball) and member of a fraternity. I’ve got a good head on my shoulders and am respectful—just looking for fun ways to connect with others in a nice part of town. I currently live in Upper Kirby.