For me, it depends on the party. If I think it's going to be nothing more than a bunch of people getting drunk, I'll skip it. If it's a party or get-together and I feel like people aren't going to be there just to drink I'll go. If offered a drink, I say "no thanks" and get something non-alcoholic to drink. In this type of party at least, more than likely no one is going to care if I drink or not.