Prince of Hamburgers has a certain low-tech charm rarely found in fast-food restaurants, what with pneumatic tubes at Chick-Fil-A and TollTag drive-throughs at McDonald's. At Prince, you simply roll into a space, turn on your headlights for service and a carhop will kindly assist you. The menu is replete with drive-in staples such as several varieties of burgers, fries and the like. But when you make a beverage choice, it must be the legendary root beer, which they make themselves. The dark draft has a thick, Guinness-like head, and with a scoop of vanilla ice cream, it's weighty enough to be a meal in itself. If you still have room, have another.