The ethnographic study examined every block in the community in 1988 to gain insights about the community's social structure and organization, to determine where crack was sold, and to converse with both dealers and users. The interviews lasted 45 minutes; were conducted by trained community outreach workers; and gathered information on behaviors related to drug use, sexual activity, and HIV risk factors. Results showed that crack sales and use were concentrated in deteriorating areas of the community. In addition, 42 percent of the youths reported at least one sexually-transmitted disease. Results suggested the need for AIDS prevention strategies that would focus on public housing projects close to crack sales, matching efforts to specific communities, the involvement of community residents in AIDS prevention strategies, and long-range efforts to reduce the economic and social isolation of alienated black communities. 18 references.