We have a lot of this sort of thing in LA (yes, in Japanese restaurants). You order by iPad, pay, and then when you get a table after waiting 3-15 minutes, you

We have a lot of this sort of thing in LA (yes, in Japanese restaurants). You order by iPad, pay, and then when you get a table after waiting 3-15 minutes, your food comes pretty quickly. When you're done, you leave. It seems to work. We Americans can adapt!