If any city was made by men, for men, it’s Las Vegas. In the early 20th century, this man-versus-nature oasis was strong-armed into being when mobsters and casino magnates swept into the Nevada desert. By the boom years of the 1950s and ’60s, these high rollers were erecting gilded penthouses and sprawling suburban ranch-style houses. Inside, shag-pile carpeting flowed lavishly across floors and walls, chandeliers sparkled like diamonds, and a legion of marble statues idled as if awaiting the reboot of the Roman Empire. It was man-made aesthetics at their most swaggering. Which makes Sin City’s latest real-estate trend feel...