Last root beer standing

The first distinctive franchise that I remember noticing as a building re-use was Dog 'N Suds, a chain of hot dog and root beer drive-ins that used to be very common in the Midwest. Used-car dealerships were a typical new tenant. I sit here far from any old Dog 'N Suds (to the best of my knowledge) and in my mind's eye I see those V-shaped canopies.