Moscow University main building has cafes, shops, dormitories and even a barber's shop. I've heard rumors that some students spent months without leaving the building.
At MIT, it's a badge of honor how many days you spend during finals living in the library, studying all day, every day. Students literally move into the library and live there. There was even a student that secretly built his own dorm room in the steam tunnels. It's on the unofficial tour as the "Tomb of the Unknown Tool".
Having worked in Cambridge steam tunnels during the winter, I suspect the "room" wasn't actually all that close to any steam pipes, because otherwise they would have found his (her?) corpse.
On campus this should be even easier, come on.