When you say every quick service has a long line, what do you mean? A long line just to get into the building? If you are planning to do mobile order, is it a long line just to be let in and get a seat to then mobile order from your table? Or long lines at the registers and long waits for your food after you order?
Long lines to go inside, so this is the procedure, they ask you to mobile order outside the restaurant and let you go in only when you're order is ready. If you cannot mobile order you make a separate line outside