Yeah, if Sam and his roommate genuinely got along then they would certainly think about filling out the form to remain roommates. If, however, he had a better friend he wanted to share with, then, well.

And you can stay on campus during the summer, but classes are pretty much required. If Sam didn't take classes, I could see him like -- getting a job in Palo Alto, finding a dumpy apartment, and moving back to campus in the fall.