There's a sandwich place near my house that works like this. The line often takes 15-20 minutes during lunch times, but I call just as I step into the line. I c

There's a sandwich place near my house that works like this. The line often takes 15-20 minutes during lunch times, but I call just as I step into the line. I can literally see the cashier way up at the front pause the whole line to take my call. By the time I get up to pay my sandwich is ready while the people before me are still standing around cramped against the counter for another 10 minutes.