If you like live theater, book yourself some seats for a play or other stage show at Nitori Culture Hall. Check online for scheduling details.
You'll soon learn why this Chuo-ku arts and culture attraction is a hit with travelers. If you're looking for more to see and do here, Sapporo JR Tower, Sapporo Beer Museum, and Odori Park are in this area as well. They won't take you long to get to from Nitori Culture Hall.