U.S. Post Office If would like to mail a letter or purchase stamps, a full-service post office is located on the ground floor (G-5122) of Strong Memorial Hospital. There is also a mail slot/drop box near the Finger Lakes Coffee Roasters on the first floor. Stamp machines can be found at the post office and near the green elevators adjacent to the Finger Lakes Coffee Roasters. Stamps may also be purchased at the Gift Shop. Hours of Operation The post office is open Monday – Friday from 9:30 a.m. – 4:00 p.m.