Before Jennifer Garner was a household name, she was a 22-year-old hostess at a restaurant in New York City. She was seating people, managing waits, and doing something else she’d kept quiet about for a long time. On the Dish Podcast with broadcaster Nick Grimshaw and Michelin-starred chef Angela Hartnett, released March 4, Garner finally laid it out. “You put the beautiful people at certain tables,” she said. “You put celebrities at certain tab…