Tongren is more of a make your own fun kind of place, if the idle looking locals are any indication.
Gamble
A rotating cast of sketchy looking characters play a 3-card Monty style game with a trio of oversize dice decorated with tiger, yak and cow pictures. Lay your money down, give them a shake and you might win back your money - or a Yak. Remember: The only way to win is not to play.
Hike
The western hills rising up next to town look steep from the bottom but the ChinFanLing on the peaks at various elevations prove it's climbable and also give you something to aim for as you blaze your own path up the more mild inclinations. A network of trails leading off from the Thangka sunning terrace behind the Monastery is a good place to start and leads to some reasonably mellow slopes that will get you high enough to see lofty snow peaked mountains in the distance.