Not in the NE, but maybe this is what you're looking for. I've been meaning to check this out with my little one for ages, but am a bit disappointed by the limited weekend offerings. If you check it out, let us know what you think!
Hettie, you're a GENIUS! I don't know how I missed this one -- we went to a birthday party at the (now-closed) east-side location many years ago, and it seemed great! This is just about the right level for what we need, I think. (As a poitn of reference, we're just finishing up a summer session of soccer at Lil' Kickers...) I just called and spoke to the owner (Carol), and got tons of info. The Saturday classes are fairly limited, but they do have one at the age level we need. I think we might check it out...
They don't list price info on the website, but it works out to roughly $15 per hour-long class. You have to "sign up" for the full 40-week school-year session, but you can cancel at any time (with 30 day's notice) and the fees are pro-rated.
Still open to any and all other suggestions, though, so keep 'em coming!