It's also a bizarre example, because there's already a very simple solution from fast food. Sometimes you can serve customers about as quickly as it takes for

It's also a bizarre example, because there's already a very simple solution from fast food. Sometimes you can serve customers about as quickly as it takes for them to order and pay (e.g. hotdogs) and then there's typically no queue, or if you can't keep up and the queue is intolerably long like in this example, then they take your order and give you a number which gets called out when you're done. This is exactly how a popular food truck would work at a fair, and you don't wait in a queue for ages, you mill around a bit and you come back when your food's ready.