This is a drive-in frozen in time. Classic cars and leather-decked bikers on the weekends share space with shiny BMWs and kid-choked Camrys. And all served by smiling carhops. The food is equally vintage. A plain burger is $2. The #5-a poppy-seed bun, double cheeseburger, tomato, lettuce, special sauce and grilled onions-is the most popular item at $2.48. Trick out your order with tater tots, fries, onion rings and a milkshake and still pay less than 10 bucks. Patrons can even toss back a beer with an order-or get a case or two of brew to go.