You will find it at 138 West 48th Street, between Sixth and Seventh Avenues on the south side, near Times Square. The Hard Rock Hotel New York faces it across the street.
The nearest stop is 49th Street on Seventh Avenue (N at any hour, R except overnight, W weekdays, Q overnight); only its uptown platform is accessible. On Sixth Avenue, 47th-50th Streets-Rockefeller Center has elevators and serves the D and F around the clock, plus the B and M on weekdays. The 1 stops at 50th Street and Broadway, and the Times Square-42nd Street complex farther south has the 1, 2, 3, 7, N, Q, R, W and S. Some lines skip nights or weekends, so check service first.