just puke on one of them and they'll get the idea; just say no
Tell them you are allergic to alcohol. Also go, get virgin drinks, and have a good time.
try a sweet wine...like moscato...or any peach wine...you can even add orange juice or pineapple juice to down the alcohol more...and if you just cant take any sort of alcohol order a coke and just be engaging no one said you have to get drunk to let loose
YOU COULD ALWAYS MAKE YOUR MARK BY BEING THE DESIGNATED DRIVER FOR YOUR DESIGNATED DRUNK COWORKERS. DRINK SODA WHILE THEY DRINK VODKA HAVE A GOOD TIME THEY WILL COMMEND YOU FOR TAKING THEM HOME SAFELY.
If you are bright enough to come up with an AP level user name, you are certainly capable if saying NO! And meaning it. Really.
Show some backbone and tell them no.
You should never feel pressured into doing something you do not want to do. What's wrong with simply telling them you don't want a drink?
do we have to go over this again? "JUST SAY NO" :p tell them you're a recovering alcoholic maybe they'll stop lol