They also never tell you beforehand, or give you a guideline. They just say, "so here's the new guy" and let you sit there and stutter for a few minutes until they realize nobody was prepared (or cares) and move on to the topic of the meeting.
Even though I don't like this, I have decided to start my time with this group off right, and have not reacted to being put in this uncomfortable situation. HA! Sorry, couldn't keep it together for that one. No, I went out to the most expensive steakhouse I could for lunch and put it on the corporate card, citing technical group discussions and onboarding. Now I know that doesn't come out of my boss' pocket, but he does have to justify it to his boss :)
Plain-old aggressive office weapon of the week: Personal Soundtrack Shirt
(ever wanted to play 'Stayin' Alive' while walking in on the first day? Or the Imperial March when a co-worker says something about the boss when the boss is right behind him? I personally have it under my button-up so I can pull it out Superman-style and put my co-workers on the spot.