Courtesy Diner, located in Saint Louis, MO, offers a classic diner experience with a menu filled with delicious options for breakfast, lunch, and late-night cravings. The diner provides a casual and friendly atmosphere with attentive service and reasonable prices. Customers praise the variety of sandwiches, including the popular slinger, and the mouthwatering chili options. Dessert lovers will enjoy the chocolate sundae and pie offerings. While the menu is relatively small, each dish packs a flavorful punch. The diner is known for its efficient service and bustling crowd, making it a favorite spot for locals and visitors alike. However, note that it is a cash-only establishment, so come prepared. Overall, Courtesy Diner delivers tasty comfort food in a classic diner setting that will leave you satisfied and craving for more.