Undergrads - Season 1 Episode 5 -

A rough night of drinking convinces Rocko to give up the booze, even despite the efforts of his alcohol-induced-hallucination-buddy, Bobby Whiskey. When Nitz is invited to hang out with Kimmy and her friends at a bar, he decides it's time to learn to drink. Gimpy provides the fake ID, but the newly sober Rocko refuses to help Nitz.