The awkward Broadway hit, set in segregated Memphis in the 1950s, means well in its pleas for tolerance, but it falls back on the usual pop cliches.In one of the numerous bits of B movie dialogue that pervade "Memphis," the 2010 Tony-winning musical now playing a two-week run at the Pantages Theatre, the show's female protagonist, Felicia Farrell, explains that "Rock 'n' roll is just black people's blues sped up."