Down here they never close the store, the guys block off part of the area under the canopy, clean that side then go and move cones to the other side then do that part then do the parking area and sidewalks.
People are always driving over their hoses, driving over the cones, etc....
I think that if I did those stores or similar places that were open while I was cleaning them, I would make the wooden road barricades and use that to block the areas. I have been wanting to make some that will come apart so they take up less room in a trailer but just don't have any of those kind of accounts yet to need the barricades yet.