Buy tickets and join the crowds at a game at Onalaska Omni Center. If there's nothing scheduled while you're in the area, you might like to check if there's a tour of the grounds.
You'll soon see why this Onalaska sporting facility is a hit with travelers. If you're looking for more to do and see here, Oktoberfest Grounds, Myrick Park, and Shenanigans Entertainment Center & Sports Bar are in this area as well. They won't take you long to get to from Onalaska Omni Center.