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Building N51 (also known as Area 51) is located at 275 Massachusetts Avenue. Enter the door to the right of the MIT Museum (when facing the Museum). Walk up a short flight of stairs and go through the door. On your left is a set of elevators. Go past the elevators, take a left down the ramp. Turn right and go through the double doors. Additional space - known as the Milk Drop Shop - for clubs and teams is located on the third floor. Take the elevator to the third floor, exit right, and the space is down the hall on the left.