One of the few false starts in the meteoric rise of Elvis Presley’s early entertainment career was an ill-fated run in Las Vegas in 1956. Elvis, Scotty Moore, Bill Black and D.J. Fontana spent two weeks trying to light a fire under a stodgy bunch of middle-aged gamesters. Even this fortnight drubbing displayed a silver lining, as an enthusiastic throng mobbed a special Saturday teenage matinee performance. This pointed to the demographic which would make up the sold-out shows when Presley returned in earnest to become the hottest ticket in town from 1969 through the end of his career.