Prompts, ay? Hm. Well, you *know* if there's excessive drinking going on, Gabe can't be too far away, so maybe:
-Gabe drags Z&S out for a night of drunkenness
-Gabe drags Zach out for a night of drunkenness
-Gabe throws a party and invites Z&S
-Gabe quizzes a drunken Zach or Shaun about their sex life
Or non-Gabe,
-Cody forgets to wear green to school
-Zach wears green but Shaun gets him anyway
-Zach gets drunk and reveals something to Shaun
-Shaun gets drunk and reveals something to Zach

Thx for being such a good sport! If I think up any more, I'll post 'em! :-D