When America's first two- and four-wheeled contraptions carried their intrepid wayfarers into the great unknown more than a century ago, a new industry was born--the roadside eatery. Roadhouses, diners, burger joints, truck stops, and, yes, the drive-in have since become venerable descendants of the travelers' inns that once dotted the wagon trail. And if anyone knows the roadside eats of today, it is the hungry biker. Whether hankering a slice...