The pool scene with 4 totally nude couples on Ecstasy shows everything male and female. His flashbacks are more graphic with Danni's hand clearly pulling on Mark's penis so they can copulate underwater. Their subsequent simulated totally nude cunnilingus/sex scene in a hotel is also fairly explicit.

Drunken man gets punched.

Party guests take ecstasy.

One of the main characters spends a good deal time getting drunk and/or high.

There is discussion of whether a character in a movie script should lose a job for taking pot, cocaine, heroin, or ecstasy.