Columbia-Harlem SBDC: Locations & Directions Address: David Geffen Hall, Room 209 645 West 130th Street New York, NY 10027 Director: Kaaryn Nailor Simmons Center: 2128537416 Email Address: sbdc@columbia.edu Hrs. of Operation: (Virtual and In Person) by appointment only Directions: The Columbia-Harlem SBDC is located at Columbia Business School in David Geffen Hall, 655 West 130th Street, between Broadway and 12th Avenue. In order to access the building, you will need to register your meeting with the Center in advance to pass through the security desk on the first floor. Take the elevator or stairs to the second floor and pass through Room 200 (the Innovation Lab) to access the center at room 290. Directions. Five bus lines (M4, M5, M11, M60, M104) and one subway line (the #1 local) come to Columbia. Get off at 125th Street and walk North along Broadway to 130th Street.