In 1966, Smirnoff Vodka hired Killer Joe Piro to create a new dance called the Mule for their new drink of the same name (vodka with a 7-Up mixer), and to release an album of music by Skitch Henderson that included a track with the same name.
As for the dance itself, the Mule Walk was usually done at the beginning, partners facing each other and most of the patterns of the dance were based on the Mule Walk.