Cadillac Five Movie Theater often offers first run movies. You don't have to stay and camp as described earlier, but it is a great time to stand around a fire talking with friends. Be sure to check with the U.S. Forest Service regarding seasonal restrictions and temporary burning bans. Go to the Library. In the fall, sometimes you have to get served inside, and then go out to the deck.
Antique stores exist both in downtown and in the outlying areas.
Join a local gun shooting range club. Rent and try out roller blades. Drive to the scenic overlook near Caberfae. Travel west from Cadillac on M-55. Turn north on Caberfae Road, then north again as the road curves going toward Harrietta.