Urban gay communities present unique populations for a comprehensive prevention program. They are well defined, bounded communities with rapid internal communication, can be considered "at risk" for alcoholism, and are traditionally "underserved" for prevention and treatment. Models of alcoholism epidemiology elucidate critical factors relevant to the urban gay population, and indigenous gay organizations afford effective means of implementing a program. The model presented in this paper is based upon current research about successful prevention programs and uses accepted strategies tailored to the specific characteristics of the urban gay community. The basic premise of the model is that community self help is the most effective approach to alcohol and drug abuse prevention.