This is the Sonic Drive-In Restaurant on west Main Street in Los Lunas, at about 8:30 PM on Thursday night.
There are still some drive-in restaurants, owned by private individuals, across America. As far as I have been able to find out, the Sonic Drive-In restaurants are the only national chain still in business.
Many fast food restaurants have drive up windows where you can place an order from your car and then take the food home, or some other place,, to eat. MacDonalds, KFC and Wendy's comes to mind.
But in a true Drive-In, you drive in, park your car by a menu board that is topped with a speaker and microphone, place your order and sit back and relax. In few minutes a waitress will bring your order out to your car. You can then sit back in the warm comfort of your own car, turn up your radio to listen to your favorite music, and eat your food. When finished you just signal the waitress and she will take away the service tray and you can drive off. I write all this, step by step, so friends in other lands can see how a true full-service drive-in operates, so American readers please be patient.