Stata Center, Mit
32 Vassar St., CAMBRIDGE, MA
50% positive
Directions: Every floor has two single stall bathrooms, each paired with a multistall bathroom; in MIT parlance the single stall bathroom has a room number 32-Dx03 or 32-Gx58, where x is the floor number between 3 and 9 and D or G is the Dreyfoos or Gates tower. Each bathroom is near a bank of elevators, sometimes behind it.
Comments: Open only during the week, slightly longer than buisness hours, though if one knows how to enter MIT main campus via other routes, they are 24hr accessible.