It’s 9 a.m. on a cool spring day on the Upper East Side of Manhattan, where the staff of the 71st Street location of Just Salad is about to be put through the wringer. Nick Kenner, the restaurant chain’s 36-year-old founder, is joining the team for the day. They’re standing in a circle, summer-camp style, running through introductions and icebreakers. “My passion has always been about operation, speed, and throughput,” Kenner says when it’s his turn.
After the intros, the group exercise starts. Employees take up their stations along the Chipotle-style salad line—cashier, lettuce packer, chopper, etc.—and a mock rush begins, with Just Salad’s head of HR pretending to be a first-time customer. As she follows her Caesar salad down the line, Kenner paces. He times the order while furiously…