there are a bunch of places in Manhattan. Renzo Gracie has a place down near 30th and 6th (or 7th) , not 100% positive, but he is there for sure. If you are adventurous, across the river i NJ (a Path ride away) a co-worker of mine trains in Philipine Stick fighting, Eskrima I believe. I would need to get the info from him, let me know if you want it.
try this link:
http://www.google.com/Top/Sports/Mar...ates/New_York/
This should start you off...
Good luck!
Rich