It is implied that Al and Imogen have sex several times, but there is no nudity or sexual action. There are several conversations revolving around sex and also pornography. Cyrus tries to come on to Al at a party. Imogen admits to sleeping with Jim Morrison. Al and Imogen drink wine at dinner.
Several characters drink beer.
Imogen and her room mate appearantly do drugs. Imogen, Eddie, Cyrus, Monk, and Jim Morrison each smoke several times. Other characters smoke in the background. This film tries very hard to capture your heart with its cute couple and wonderful secondary subplots.