At MIT, we had:
Undergrads: (all undergrad dorms house freshmen through seniors)
1 all-women's dorm
4 dorms with suites - some suites were single-sex, others were coed by room (I lived in one of these dorms)
5 dorms with halls - coed by room
Grad students:
1 (very small) all-women's dorm
1 dorm with suites - coed by room
2 dorms with apartments - coed by apartment
Married student housing:
2 apartment buildings - apartments were a mix of efficiencies, 1 bedroom, and 2 bedroom - 2 bedroom apts. were only available to those with at least 2 children
Since I graduated, an additional undergrad dorm has been built (I think it opens this fall) to accommodate MIT's new policy that all freshmen must live on campus.
There were no restrictions on liquor or other drugs, overnight guests, or anything else - except pets. You weren't allowed any pets other than fish. However, a LOT of people had cats... if you were allergic to cats and your suitemate had a cat, you found another suite to live in. I know one guy who named his cat Fish, so that if the house manager challenged him, he could truthfully say "I only have Fish."