Ithaca Mafia.

This video is an example of what makes the internets so great: before, a little-known 1964 documentary entitled This is Ska! would have been lost to the ages and ether.  

Now, it lives, forever, as 1’s and 0’s, on the servers of YouTube.

Be sure to watch and learn these steps.  I expect all of us to give it a shot at our next gathering.