A Vietnamese restaurant near Seattle has one of these and they are both annoying and useless. The device rolls slowing between the tables playing a repetitive t

A Vietnamese restaurant near Seattle has one of these and they are both annoying and useless. The device rolls slowing between the tables playing a repetitive tune like a popsicle truck. Meanwhile the server walks along next to it and pull the food off the tray and puts it on the table. There is no labor saving or time saving benefit. I suspect that they do it just to seem “high tech” but its not impressive.