coin-operated snack bar; vending-machine restaurant
A roadside eatery where food and drinks are purchased from vending machines rather than from staff. Wasei-eigo; not used in English.
wasei-eigo (Japanese-coined English), from coin snack
There is a coin-operated snack bar at the highway rest area.
During a late-night drive, I bought udon at a vending-machine restaurant.
Variant with interpunct; less common but seen in some signage.
Wasei-eigo from English 'coin' and 'snack', referring to a self-service eatery with vending machines.