I really wanted to have a margarita on my birthday (at lunch), but my boss was sitting right there and I just thought it would be a bad thing for him to remember about me... so I didn't do it. I'm sure I would have handled it well, but just the impression it would have given just doesn't fit in with the buttoned-up gov. world. In some industries, it might be more common... in this city, for the most part, it's probably the wrong choice to drink at lunch.