The Groove - Key of C. Late 1960s rock blues played in a style typical of the fashionable players of the time. Eric Clapton, John Lennon. Taj Mahal and the Allman Brothers, among many others, all played music with this kind of groove and feel. Both the lead guitar and the slide guitar are played in an Eric Clapton, Delaney & Bonnie style, which became known as Southern Rock and Southern Soul.