I remember the novelty of a chicken ring vending machine at college 35 years ago. Rings instead of nuggets because more dependable on heating, but you'd pay and it would drop the rings into hot oil for an appropriate 3-4 minutes, then dispense in a cup. They were quite passable, and it was nice to have a hot food option next to the cold sandwiches and like cold burgers/burritoes you could heat in the microwave there.