I'm not giving up my racquetball, mind you, but Pickleball is something almost anyone can play, and requires minimal equipment. It can be played on a tennis court (with the appropriate lines added), a basketball or racquetball court, so long as there is a net. The playing area is smaller than a tennis court, and you use paddles and a wiffle ball. More specific info Here.
I really like being able to play this sport outside, since there are no outdoor racquetball courts around town anymore. Plus, there's not near as much chasing the ball when it goes out-of-bounds, like I always have to do when I attempt to play tennis.
