What follows is a very sad list of practice rooms for rent. I would love to find a real piano to play on, and not in the theater district, but I guess I can't be too choosy. I'll add to this list if I find more. Maybe it will be of some use to other musicians!
244 Rehearsal Studios – $20/hr Baby Grand Pianos
54th & 8th Ave
Chelsea Studios – $20/hr no pictures of space/pianos ???
26th & 6th Ave
Michiko Studios – $20/hr Upright Pianos
47th & 7th Ave
Studios 150 – $17-20/hr Upright Pianos
46th & 7th Ave