Can't Hardly Wait (1998)

Its high school graduation, and like all seniors they want to party. So 500 high school seniors look forward to a party, while in the meantime a boy wants to get a girl he's loved for years that just broke up with her boyfriend and one head-case that wants revenge on a lifelong bully. So the party comes, things develop. People have sex, drink, and go along with most of the guidelines of a high school graduation party.