Fine dining restaurants are full service restaurants with specific dedicated meal courses. Décor of such restaurants features higher-quality materials, with an eye towards the "atmosphere" desired by the restaurateur. 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.