Mark David Married “Dancing with the Stars” dancers Valentin Chmerkovskiy and Jenna Johnson — she’s cha-cha-chaed through four seasons of the long-running hit show and he’s rhumbaed and tangoed through fifteen — have quick-stepped their way into a family-sized house in a sought after area of the largely unsung and quintessentially suburban Tarzana community in L.A.’s sprawling San Fernando Valley.