We do swim a good bit in the summer but don't own a pool. We do have open access to relatives', but it's a production (20 minute drive, plus schlepping all our stuff) so not feasible of we want to make progress on any other front that day.
My girls were on a swim team last year but it is at a terribly inconvenient time for my boys' schedules, plus it really cramps our school day.
They have done soccer and basketball in the past, too.
I think the real problem is that I have a hard time managing it all, and the only time dh can help is late afternoon and night (unless he's traveling, which is semi-frequently).
Where's the whiney icon? ;)