There was a time when the 'good girl' in me would have answered this question, just because I thought I was supposed to answer people's questions. Someone asks, you answer. I'm less inclined to do that any more (a wonderful condition that started when I turned 40) and that particular question -- here in Manhattan at least and possibly elsewhere though I can only speak for here because here is where I am -- reflects badly on the asker. It's well known that people ask that question to classify the person they are speaking with (trader, actor, socialite) and it's just rude, really, in so many ways.
So these days, if the olive-retrieving plebe is crude enough to ask what I do, my response will be something along the lines of, "Oh, I try to do as little as possible, don't you?" *wink wink*
I love this. It completely frustrates the "What's Your Caste" game player, and instead of finding out whether they can adjust their head above or below mine, it frees them up to talk about more important things -- like what kind of music they enjoy or, I don't know, whether they read actual books or use a Kindle.
And isn't that what we really want to talk about anyway?