21st

Marco Zappia ducks as he crosses the slightly-too-short threshold into the sauna in his office. A lanky 6-foot-2, he has to watch his head.

Having round-the-clock access to one of those build-your-own sauna kits that became so popular during the pandemic isn’t just a perk of the job. Zappia, 30, and his team, 3leche, retrofitted