I knew somebody who used to drive a golf cart up to drive-throughs and then pull forward to complain about them not taking her order (golf carts are typically too light to trigger the "doorbell" or whatever device used for drive ups). One would imagine that it's the same situation with pedestrians. Now old school walk-up service works fine.I suppose you could walk up to these various drive up places. I know that one wouldn't want to be the only pedestrian in a conglomeration of cars, but I don't think you would be refused or hauled away to jail. Back in my misty past, I recall doing that at a drive through bank ATM and also at a Taco Bell. I don't remember the details like why I did it though.