These seasoned performers are among the highlights of the show at Moonlight, which is far superior, because it has a live orchestra versus the Welk’s pre-recorded score. Guerrero and Rudolph collaborated early last year on a production of “A Chorus Line” at the Welk Resort Theatre in Escondido, and Guerrero rehired about half of that cast for the Moonlight show. And thanks to the cast’s impeccable dancing and beautiful vocal harmonies, which were coached by conductor and music director Randi Rudolph, the show flow seamlessly through its two hours, 20 minutes, including intermission. That might sound like a dull setup, but the catchy and cleverly worded songs by Marvin Hamlisch and Edward Kleban are beautifully interwoven with the book by James Kirkwood and Nicholas Dante. While the authoritarian director Zach gradually whittles down the hopefuls from 24 to 17 to eight, he asks questions about their lives, and they take turns telling their stories via inner and outer monologues, songs and dance. Based on recorded interviews show creator-choreographer Michael Bennett conducted with real Broadway dancers in 1974, the Pulitzer Prize- and Tony Award-winning “A Chorus Line” takes place during the final day of auditions for chorus dancer roles in a new musical.