From the less inhib­ited night clubs and dance halls the Mambo under­went sub­tle changes. It was triple mambo, and then pecu­liar scrap­ing and shuf­fling sounds dur­ing the “tripling” pro­duced the imi­ta­tive sound of Cha Cha Cha. This then became a dance in itself. Mambo or triple Mambo or Cha Cha as it is now called, is but an advanced stage in inter­pre­tive social danc­ing born of the fusion of pro­gres­sive Amer­i­can and Latin music.