Your post said you're not looking for gyms, but you might want to reconsider. My husband and I go to Sport & Health in Tenley (we live in Bethesda), and many of our friends go to the one in Bethesda. Our kids love the child care at the Tenley location, and the yoga classes (especially Saturday morning and Thursday mornings) are fantastic. Worth a try! Plus, I think it's only $20 per month per child for child care.

I know about Lil Omm but that's too far. I would also be interested in exercise studios (not gyms--I already belong to one) that offer one-off classes of any type with babysitting. I know about Next Phase but that doesn't work with my schedule.