Styx and Def Leppard were in true rock ‘n' roll form Wednesday on the Oklahoma City stop of their world tour. Celebrating their 30th anniversaries, the bands proved that they can still rock and still draw thousands of frenzied fans to their shows.

Styx opened the show with "Blue Collar Man,” one of the band's 29 hit singles. The audience, an eclectic mix of 30- and 40-something professionals, their kids and ai...