I’m sure, strangely, that this has happened to many people, one other guy in my tiny dorm suite for sure.

dorms
showertime - get the grit off
soap check, ‘poo check, condi check, toothbrushpaste check, towel check
who needs to bring a change of fresh(er) clothes?
who needs to bring a key?

key left in dorm room
single dorm room
ha/ra not in town
big big frown
so I walked across the quad in a towel
and got an ha/ra on duty to let me in

good thing I went to school in so. cal where people frequently are walking around with a towel or sari