WE are haveing a buffet dinner and an open bar but we need a rough estimite on who will be partying a lil harder then some of our more conservitave guest in order to 1. not over spend and 2. so that we are able to know about how much liquor is needed. How do we ask this on a RSVP card without it sounding werid or offending the buzz kill side of the family (haha just kidding...But seriosly)?