I play social dubs at my club sometimes when I can't find someone to play or I don't feel like grinding out a singles match.
I'm usually far better than most of the players, but it gives me an opportunity to work on different serves, volleys, overheads. And have everybody ask me where I played in college (I didn't) so it's good for my ego. But sometimes it's pretty boring. Oh well. Bad tennis still beats hitting the treadmill.