As a resource for your own information or for teaching, check out the two links to similar graphic handouts on dance floor etiquette. They were produced by a couple of organizers with a talent for creating order. (Any guesses on where they're both from?) I'm not per se endorsing the material - I'd personally make a few different choices - but they are nonetheless a good and useful resource.
http://www.gehberger.at/download/codigos_en.htm
http://www.xamooja.com/downloads
-Tim