* martial arts (MMA, BJJ, even krav maga)
* crossfit [1]
* cycling (mountain biking, road cycling)
* volleyball or surfing if you're by a beach
* even a pick up basketball game
In my opinion, doing something athletic as a group should be a mandate for everyone. There are too many benefits, physically and spiritually.
If you are hesitant or if you find yourself having a negative reaction to what I am saying, I would encourage you to contemplate why you may be thinking that.
If you are worried you are not athletic enough and feel emberrased, do not think that for a moment. I was the same - I am horribly uncoordinated and I still do stuff.
[1] Some crossfit folks call it "church," which should be telling