Requirements that customers wear masks in stores, restaurants and other establishments are often just requests. Workers must enforce compliance. : The alert went out to Johann Baqueiro: A customer was sipping her Starbucks coffee inside the Ralphs supermarket and she wasn’t wearing a face mask. As a meat department manager, Baqueiro usually is focused on keeping customers happy with just the right cut for that night’s dinner. But the other day, Baqueiro found himself once again leaving the meat counter to deal with another barefaced customer.