IT LOOKS LIKE quite a man’s room, don’t you think?” asked Australian interior designer Greg Natale of this swaggering, strategically indelicate study fashioned by the late Spanish designer Paco Muñoz (1925-2009) for his home in Madrid. It’s a space Mr. Natale has long admired. “But refined,” he added. “I really like a man cave as long it’s sophisticated.”
The room, completed in the 1970s, offers a firm handshake rather than a fist bump, a color scheme invested in browns, black and white rather than muscle-car reds and playing-field...