Here in PHX, AZ, the stores are placing tape or signs on the floors, marking 6 feet intervals.
Safeway(s) and Circle K(s).
Also plexiglass shielding / barriers at the checkout counters between the customer’s card reader area and the cashier’s work station.
Fry’s is doing it also.
yes we also have the markers on the floor show 6 feet distances. We Do NOT have the “Spit shields” in my store.