Yoga or Pilates in the slope....where to go?

I haven't been to yoga in a while, but I go to the Park Slope Yoga Center. You can pay by the class or get a class card so you're not tied to a specific time.

But there are lots of yoga places in PS, and I know I've seen pilates offered as well. I suggest doing a search - there are a number of threads on this subject where you can find good suggestions.