The current customer cafeteria experience might sound a little something like this:
Grabs a just washed wet plastic lunch tray
Slowly slides tray passed a low variety of pre-made meals or a menu filled with limited options, while multiple cafeteria workers wait in anticipation for their order
Waits in a long line to checkout
Cashier rings up the order by using a traditional cash register
Purchases their meal by using cash/coin and then proceeds to wait in a group of people for their lunch selection to be ready
Enjoys their once hot lunch, cold