Katie Ulrich was all verve and warmth as leading lady Janet Van De Graaff in Boulder's Dinner Theatre's production of The Drowsy Chaperone, a daffy, sweet-cynical tribute to '20s musicals. Van De Graaff was forced to choose between an acting career and love, and explained her choice in a sizzling number called "I Don't Wanna Show Off No More" — demonstrating her lack of interest in stardom by strutting, sashaying, blowing kisses, turning a somersault and throwing a few perfect cartwheels. Some of them one-handed. And all the while, she sang quite beautifully.