Eh, I've worked with people like that. Never understood the rationale behind it. Even when I'm drunk, I've never felt a desire to get physical.
I didn't do sports as a kid either, but I did do martial arts for about 8 years, so if I did get in a fight I think I could hold my own. But like I said, it's not at all my style or tastes.
Sorry to hear they messed with your night though. Never a good way to go out.