For Friday afternoon and Saturday shopping, Fotocare and Calumet are on the same block of 22nd Street, between 6th Ave and Broadway. A very good lab, Vista + CRC is also on that block a couple doors down from Calumet. Fotocare doesn't have chemicals but has film, Calumet has a limited selection of chemicals (e.g., D76, Extol) as well as film. Both have a small selection of used film cameras though I like Adorama best for ogling that stuff.