Students and staff only. Amsterdam Avenue, enter Zysman Hall and turn right and walk up the steps. Turn left and walk through the hallway into an outdoor passageway. Walk until the end and turn right and go through the door. Walk up the steps and walk straight to the end. The (front) entrance is on your left. Alternatively, you can enter Muss Hall from 187th Street between Amsterdam and Audubon, by the security booth. The (back) entrance is on your left.