And people on CC are mad/surprised/disappointed colleges aren’t setting up isolation/quarantine locations on campuses. There just aren’t enough rooms available.
A lot of popular college towns also have housing restrictions on more than 4 unrelated people living together. That’s the case in Boulder so even if a landlord wanted to let the students double up it is illegal. Some of the sorority and fraternities might be able to take in more of their members if local ordinances are waived (and fire codes still respected).