Why are some of the waiters NOT wearing masks during this time of Covid?

Mexican restaurant

226 E Main St, Grass Valley, CA 95945, USA

American restaurant

2075 Nevada City Hwy, Grass Valley, CA 95945, USA

Mexican restaurant

760 A S Auburn St, Grass Valley, CA 95945, USA

Winery

19698 View Forever Ln, Grass Valley, CA 95945, USA

Retirement community

625 Eskaton Cir, Grass Valley, CA 95945, USA

Apartment building

1444 Segsworth Way, Grass Valley, CA 95945, USA

Apartment building

275 Dorsey Dr, Grass Valley, CA 95945, USA

Assisted living facility

415 Sierra College Dr, Grass Valley, CA 95945, USA