You would be surprised what 20 year Olds will tolerate to have their own space....I had 5 at 21..
One never bathe
One would get drunk snd punch holes in the drywall
One sleep walks in the .nude
And two I'm convinced were in a secert gay relationship..because they use to share a bed all the time... quite a few times I came home late and the bedroom door was locked ( they had the only other bathroom).
But hey it was a3 bedroom condo, split 5 ways so rent was dirt cheap