They just have fun talking about physics with one another. However they may view themselves, physicists aren't likely to lose their image of respectability any time soon. Based on her experience at various scientific banquets, Ms. Williams of San Francisco State rates geologists as the true party animals, followed by astronomers, then physicists. They tend to be very conservative. But you know, physics is a serious business.
Astronomers are a lot easier.
Coincidentally, the American Astronomical Society is also celebrating its centennial this year and the Physics Chanteuse has been hired as the entertainment for its main banquet in Chicago in June. I can't wait.