RCW 66 refers to the Revised Code of Washington Title 66, which governs the regulation of alcoholic beverages in the state of Washington. This code outlines the laws and regulations regarding the sale, distribution, and consumption of alcohol, including licensing requirements for businesses and penalties for violations. The code is designed to promote public safety and responsible alcohol consumption while also supporting the state's economy through regulated sales. It includes provisions for various types of licenses, such as those for restaurants, bars, and breweries, ensuring that all establishments comply with state laws.