The problem is the kind of dancing you people are doing. They had the same problem in Ireland a long time ago. A little too much drinking, arms swinging all over the place, and before you know it, a fight breaks out.
You know, there's a law in Ireland that whenever there's line dancing you have to keep your arms straight down on your sides. See for yourself.
https://www.youtube.com/watch?v=0u0nUU126Hc