The regional grocery chain here is starting to get a bit more serious. They have plastic guards in front of the cashiers, and direction lines in all the aisles turning everything into 'one way streets' so nobody crosses paths and you're not allowed to put anything on the conveyor at checkout until the person in front of you is done and the cashier has sanitized the whole thing.
They also have someone standing at the doors doing nothing but sanitizing carts as they get put back most the times I've gone through there. Everyone that is working there is also getting a 10% pay increase while this is going on as "hazard pay" which is better than a lot of places I've seen.