The Diner at Sugar Hill: The Diner at Sugar Hill is located in Gwinnett County! This diner features a large breakfast selection including everything from southern biscuits to waffles and french toast! For dinner enjoy a vast menu with everything from steak to country fried steak! Of course save room for desserts! The Diner at Sugar Hill features a huge selection of cakes! Cake slices that seem to be 8 inches or more tall! Dessert is a must at The Diner at Sugar Hill!