You may think that TV competition shows are responsible for the rebirth of swing, but you can go back to 1998, when a Gap commercial for khakis kick-started its comeback, and then the fall of 1999, when the Broadway hit "Swing!" made it cool to jump, jive and jitterbug again.

There are so many gasp-inducing moves in Pittsburgh CLO's "Swing!," at the Benedum Center through Friday, that it can be dizzying to watch. This is song-and-dance theater rather than musical theater -- there's no through story line and no dialogue, unless you count the rom-com playfulness of a few duets or the body language that allows the guys to "throw that girl around" with abandon.

The show is steeped in nostalgia for the dance floors of the 1930s and '40s. Highlights are when Mark Stuart Eckstein is front and center or partnered with Beverly Durand as the West Coast Swing Couple in "Throw That Girl Around." "Swing!" can be fun or touching when things slow down, too. Tall and sexy Lori Barber interprets the bass in a duet of "Harlem Nocturne" and partners with Carlos Sierra-Lopez for a steamy "Blues in the Night."

Let's now turn and face the music in "Swing!"

Alan H. Green returns to CLO for the first time since 2003's "Miss Saigon," and he's been away way too long. He sings, he dances, he scats and he owns the stage whenever he's on it, with CLO newcomer Deb Lyons a perfect foil in two delightful duets. Lyons' wide range of tunes includes the solo show-stopper "Stompin' at the Savoy," with lyrics that explain swing's roots at the Harlem club. Another first-timer, Kate Loprest, scores with comic timing, and Matthew Scott is a steady voice throughout.

Some members of the eight-piece band, led by music director Craig Barna, get their due at center stage, none more effectively than the trombone answering Loprest's lament in "Cry Me a River."

If there's a lament from the audience, it's for a couple of numbers when dancers and their darkly shaded costumes seem to fade into the set amid the muted nightclub lighting. When "Swing!" is moving on all cylinders, you don't want to miss a move.