I am just finishing up my third day on the diet and things are going very well. However, my 21st birthday is this weekend and I was wondering if one night of drinking would seriously derail my progress. I know alcohol is forbidden, but if it were kept to one night are there any specific measures that can be take to limit the damage done? Obviously not drinking would be best, but you only turn 21 once and I am going to have serious difficulty not going out with my friends and having fun. Any feedback is much appreciated.