Fine dining restaurants are full service restaurants with specific dedicated meal courses. Décor of such restaurants feature higher-quality materials, with an eye towards the "atmosphere" desired by the restaurateur, than restaurants featuring lower-quality materials. The wait staff is usually highly trained and often wears more formal attire. Fine-dining restaurants are almost always small businesses and are generally either single-location operations or have just a few locations. Food portions are visually appealing. Fine dining restaurants have certain rules of dining which visitors are generally expected to follow often including a dress code.