Rock 'n Roll is the music that was popular in the Fifties (1950s) and early Sixties (1960s). Rock and Roll is similar to blues, but it's faster. The first R&R song was probably "Johnny B. Goode" by Chuck Berry.
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog
