ROCK'n'ROLL is a name for:

1. Social dance Jive 

2. Group of social dance styles - typically:

   - Jive (US) known as Rockabilly which is the earlier version of the dance with a bit more of the Country flavor and more of Lindy Hop and Swing steps

   - Jive (EU) which includes the Boogie-Woogie step popular in Europe

   - Boogie-Woogie danced primarily in Europe

  The musick is Rock'N'Roll and Rockabilly