In a high school theater in Arcadia, Calif., Amber Zhang and the rest of the teenage cast of a production of Molière's comedic play The Miser gather in a tight circle.
"Everyone say, 'Hey, hey, hey!' " bellows Xochitl-Julisa Bermejo, an instructor at Arroyo Pacific Academy. "Helloooo!"
Zhang, cast as a spunky ingénue, throws her body — and pipes — into the exercise.