Once went to a friend's wedding. I was friends with everyone at the table except for one guy. We went up to dance because the bride and groom asked for people to come up to the dance floor. We tried to convince that one guy to dance, he wouldn't. Mind you, we're all goofy ass dancers, but we wanted to support the groom because he's a friend and paid for a DJ and a dance floor.
The one guy who wouldn't dance seemed to be convinced that he would be cooler if he didn't dance, so he sat at the table alone and drank alone. Sometimes the coolest thing is to act like a dork and just get some moves out.