Summer lap swimming in PS

Hey all,

I've seen the posts in the past about places to swim in Park Slope (the Y, Berkeley Carroll, The Garfield Temple, the Eastern Athletic), but I was wondering if there was any place in the area that had lap swimming in summer afternoons.

The Y doesn't look like they have lap swimming at all in the summer (all classes), Berkeley Carroll only has swimming at night, and I can't afford the place on Eastern Parkway. Anyone know of anything? A short subway ride (pref on the F) is ok.

Thanks,
Scout