Yes, it's extremely common to share, especially in the first couple years. Many many colleges require students to live on campus freshman year and the provided

Yes, it's extremely common to share, especially in the first couple years. Many many colleges require students to live on campus freshman year and the provided housing is forced doubles (or even triples) and sometimes even temporary housing. As for why -- it's cheaper to stuff 2 or 3 students into 1 dorm room, obviously.