This diner chain features a salad bar, but the real favorites are greasy, fried and come with a special sauce.. In Short Booths abound, as these restaurants were designed with groups and families in mind. The salad bar doubles as a breakfast buffet on the weekend. But, the secret is in the pinkish, sweet and tangy sauce drizzled over everything from Slim Jim to burgers. And the debate rages: Some say it is Thousand Island dressing, while others guess at a measured mixture of ketchup, mayonnaise and, well, something else. Whatever it is, it's popular.