I don't dance...am I a bad person?

I refuse to dance. It’s not that I’m terrible at it – I can blend in fine on the dance floor. But never in my life have I eve had fun doing it. If I am drunk, I feel very uncomfortable dancing, and if I am sober I feel extremely uncomfortable dancing. Overall, dancing just makes me feel extremely anxious and unhappy.

Lately, as a result, I have just been opting out of all dancing related activities instead of trying to fool myself into thinking I’m having fun. This seems to be a buzzkill for most of my friends/people I happen to be with. Whether at the bar, club, or party, once someone says “lets all go dance!” and I politely decline, everyone seems to be come somewhat suspicious of me, the cynical guy who dares to challenge their idea of fun by retreating to the couch or the bar.

My questions are:
1. Does this make me some kind of asshole? Am I really expected to suck it up and dance? People usually tell me if I keep dancing I’ll eventually start having fun but this never happens.

2. What can I tell people to help them understand that I just don’t like to dance, without being some sort of party-pooper? It seems like the more I try to explain that I don’t dance, the more they try to drag me on to the dance floor.

What to do?