Beverly Hills is plush with backyard pools, as several of The Real Housewives of Beverly Hills have demonstrated. But while Dorit Kemsley bathes her pool in colorful lights, Teddi Mellencamp-Arroyave loads up on inflatables, and Kyle Richards sips her morning coffee while gazing on a peaceful patch of chlorine, Lisa Rinna has no pool to speak of. As it turns out, there's a good reason for that.