Wearing a tight black V-neck T-shirt and mid-top sneakers, Jeff Platt, 32, glides his Tesla to a stop, snaps off his sunglasses and enters his 30,000-square-foot kingdom: a warehouse near Los Angeles outfitted corner-to-corner with trampolines. Employees in orange shirts emblazoned with the name Sky Zone tend to the jousting arena and dodgeball court. Opening time is approaching, and hundreds of kids—most between 6 and 17—will soon arrive to bounce in anarchy.
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