Like nearly every British rock musician in the mid-'60s, the members of Led Zeppelin played in groups specializing in amped-up versions of black American music like the blues, R&B, jazz, and soul. To play that music convincingly, you had to swing, and few drummers in any genre have swung with as much swagger as John Bonham ... Despite all the deserved attention paid to his brilliant soloing ideas, his rhythmic sophistication, or his bass drum prowess, John Bonham was, above all else, a groover.