[sergiosgc]

If we're trading exercise experiences, I'll vouch for regular tennis. It's easy enough to learn as an adult, you do not have to coordinate a full team to play a match, the aerobic load is entirely dependent on the level of your sparring partner and, for me, it has the social aspect that guarantees I keep practising. Even when I don't feel like going, there is someone calling and challenging for a match.

The usual warnings apply: It is asymmetrical and, for God's sake, buy a good racket or you will get tennis elbow (good dampening of vibrations virtually eliminated tennis elbow, but only the good material does it right)