This isn't very 50's but everyone in the 1950's did know how to dance. They probably just didn't Boogie too much!
Every time I watch this I am amazed at the level of energy they put in to their performance - all below the waist! Makes me exhausted just watching it. And if it doesn't look all that hard (it's not supposed to, that's why they're professionals) when was the last time you just jumped rope for 2 1/2 minutes? It's harder than it looks too.
