I shudder when I see photos of some contemporary dorm room set-ups, like quads with two sets of bunk beds in one room. AAAACK! I couldn't have lived that way, not even back then.

The other thing I would dread would be having to share a hotel room with a colleague for business travel. I would die. I would pay extra for my own room to myself. I would even also cover the other half of the room I wouldn't share with the colleague. Anything but sharing.