Yes - I do abstain from time to time but if it's a one on one meeting I want to make the other person feel at ease. In group settings I'm likely to get a soda water at the bar without the vodka and no one will be the wiser.
You do what is best for you, I think that is what I mean. I just don't like it when people cajole others into drinking when they normally wouldn't. No one should be made to feel that they aren't normal because they don't want to drink.