Nyspi (Columbia University Medical Center)
1051 Riverside Dr, New York, NY
Not yet rated
Directions: Pedestrian-accessible entrance on Haven Ave, just west of Ft. Washington. Go through the big cafeteria area and over the footbridge to the NYSPI building. Gender-neutral restrooms are on the 5th & 3rd floors (and probably others).
Comments: You need to sign in as a guest, but don't need an appointment or anything.