Madam Tussauds 
Magic After Hours
Magic at the Clock Shop
Magic, Unlocked
Magician, The
Maison Gerard
Majestic Theatre
Management
Manhattan Theatre Club
Marc Straus Gallery
Margot Samel
Marian Goodman Gallery
Marianne Boesky Gallery
Marinaro Gallery
Mark Morris Dance Group
Marrow
Martha Graham Dance Company
Martha’s
Martos Gallery
Maruani Mercier
Massey Klein Gallery
Matthew Marks Gallery
Max Estrella
Megan Mulrooney
Mendes Wood DM
Mennour
Mercer Labs
Met Cloisters, The
Metropolitan Museum of Art, The
Mezzrow
Michael Rosenfeld Gallery
Miles McEnery Gallery
Mmuseumm
Modern Eden
MoMA PS1
Morgan Lehman Gallery
Morgan Library & Museum, The
Morris-Jumel Mansion
Mrs. Gallery
Museum at FIT, The
Museum of Arts and Design
Museum of Modern Art, The
Museum of Television and Radio
Museum of the City of New York
Museum of the Moving Image