You know what? Those are so similar to what are taught in the group classes (social/american style) in our studio! The swing (east coast) routine shown here is exactly the same. I bet there are teaching videos studios use to faciliate their teaching of social/amer style dances. The rumba (the left one) is american style rumba. The chacha (the left one) is american style chacha? I don't know - that's why i said the other day i don't know what amer. style chacha is but that is what is taught. The