I know how you feel. Once a month we have these mandatory team pow-wow pizza lunches, wherein all they serve is pizza, breadsticks, and cookies. I know this in advance and try to bring my own lunch (or at least a Larabar). It always amazes me how people will get on your case for being antisocial for not partaking in the communal feeding trough.

My only consolation there is that the pizza they order in is naaaaasty. If I'm going to fall off the gluten-wagon, it's going to be for something that's high quality.