The Whole Foods Market near me is opening only every-other register. They limit the number of people in the store at any given time and also limit the number of certain type of items to prevent hoarding. There is one checkout line with enforced social distancing and a director who sends you to the next open register. This seems to be working and has not incited panic. I know this from my neighbor who works there. I haven't left the house in weeks. If I need something, I have it delivered to my porch, decontaminate it, then bring it inside.