THE BAR THING IS DEFINITELY THE WORST! The fist time I tried to quit while I was in my twenties, the drinking thing was the worst for me, and because of drinking to excess, I was UNSUCCSESSFUL at quitting smoking.I just wasn't ready, and socializing with alcohol was more important than staying off cigs for me at the time. Now, at 39 yrs old, my socializing is a couple of drinks wit dinner with my family, and it is definiely easier to deal with. But for the first two weeks, I drank diet coke instead of Rum and diet coke. My advice is to go on the wagon from alcohol for a couple of weeks. It most definitely WILL NOT ruin your social life if you don't partake in the cocktails while your friends do. It might actually be fun watching them get all silly while you still have you wits about you. Also, consider Nicotine Replacement, like the patch, gum etc. It can make the fist few weeks alot easier.
Good luck!