These forums get you nowhere. There's another option in town called Milwaukee Sports and Social. They run basketball leagues year-round. They are dope as hell. So well run and put together. I have been playing in their sports since they launched earlier this year. The guy is charge is cool. Super laid back dude.
Here is a link to their leagues. They have 1 going right now that I am in and they are launching another one in winter, which I am also playing in.
Check it out: https://milwaukeesportsandsocial.com/collections/available-recreational-basketball-leagues-milwaukee