This man cave from Jonathan Bane and @mancavemasters started as an empty 14- by 20-ft. shed. He installed old school arcade games, a TV and cozy couches to create a nostalgic backyard getaway.

Rich mahogany, leather seating, sports memorabilia, and intense video game setups are traditional ingredients for tricking out the unnatural habitat known as a man cave. But that stereotypical ...