Some US restaurants are requiring proof of vaccination to dine in Get ready to flash your vaccine card at the host stand Written by Advertising Dining out this weekend? You might want to have your vaccine card handy just in case. With the Delta variant spreading and Covid-19 cases in the US on the rise, some restaurant owners are saying 'No vax, no service.' In Los Angeles, where an indoor mask mandate was reinstated earlier this month, some bars and comedy clubs are checking vaccine cards (or negative test results) at the door. Earlier today, Danny Meyer's Union Square Hospitality Group announced it will require all staff and indoor diners in New York City and Washington, D.C., to be vaccinated come September 7.