From Stanford to Harvard, more than 30 colleges offer coed dorm rooms or gender neutral housing. Male and female friends can room together by request. The option was first designed to accommodate lesbian, gay and transgender students who felt more comfortable rooming with someone of the opposite gender, but it was later expanded to include anyone who requested it.
Note: These rooming arrangements are by student request only. So if you discover that your child is suddenly rooming with a member of the opposite sex, talk to him candidly before approaching university housing officials.