Best broom-dancer I knew was Miklos Menis, who was a mixture of Italian and Hungarian. I imagine that historically the first broom dance ever was performed within a few hours of the first construction of a broom. And probably utiliseed the steps previously appropriate to the stick-dance, which was in use shortly after the invention of the stick. And I'd guess that the Cornish steps arent that different to the Uzbek ones. And also that, in most cutlures, I wouldn't be surprised if people are more prepared to have a go, and the steps attempted get more ambitious, as alcohol intake increases.