Can I ask how old you are? How many of your friends are interested in dance? Are you interested because others are going or does it stem from an intrinsic desire?
Many of my friends (late 20's, early 30s) wouldn't dream of being the first on a dance floor, or trying a class. I think most would rather shoot hoops or go hiking. Dance doesn't even occur to them as an option.
My personal theory is that there's a stigma. Social dancing is what old people do. (Although I don't want to discount the k-pop dance scene I witnessed in college. That had a more performative aspect to it though, like marching band).