From left: Joe Ngo (Chum), Abraham Kim (Rom), Kelsey Angel Baehrens (Sothea), Jane Lui (Pou) and Tim Liu (Leng) in East West Players' "Cambodian Rock Band" (Photo by Teolindo) East West Players’ “Cambodian Rock Band” essentially tore up the stage of the David Hwang Theater in Los Angeles while wrapping up its extended run last weekend. An explosive blend of music and storytelling both humorous and harrowing, Lauren Yee’s play as directed by Chay Yew is the kind of performance