You've got it all wrong - these guys are going to be totally jealous that you're still young and will wish to relive their collegiate heyday through you (and your drink selections).
Stick to ordering mixed drinks with super fratty names like "Adios, Motherf***er" and "The Panty Remover." Each time you place a drink order, make the hardcore/devil sign with your first finger and pinky extended, and stick out your tongue while closing your eyes.
When the drink arrives, again turn to the group, make eye contact with each member, and loudly announce your beverage by name, taking care to extend the first vowel sound. For example "Aaaaaadios Motherf***er" or "Paaaaaaanty Dropper!"
Drink every drink in under 10 seconds, no exceptions. Devil/hardcore signs again when you finish it.
Everyone will love you.