The Power house Bar has a league, Minnesota Power, Mike Wicklund's old partner runs one on Wednesdays, and I know there are a few others still out there.
The Twin Ports Bass Masters is still around, but pretty quiet now. Steve and Roger would know who to talk too. Brian Granholms bass league from Angler Insider. Another bass league in Willow River.
Not sure of any others off the top of my head.