Drink Every Time:

1. Anyone places a bet
2. Wayne Newton is shown or mentioned
3. We see a shot of the Griswolds sitting and clapping in the audience of any show
4. Anyone says "Pappagiorgio"
5. Anytime Vicki gives Audrey advice
6. Cousin Eddie does something trashy (like cooks on a rock or orders a big drink)
7. Cousin Eddie brings bad luck
8. Clark is visibly excited about something

Want to get wasted?

Anytime a casino chip or a bill (any denomination) is shown