 The proposed project responds directly to the calls by public health authorities for the development of efficacious risk reduction interventions for substance using MSM. South Florida consistently ranks in the top three MSAs nationwide in HIV and AIDS incidence and prevalence. South Florida is also a well-known migration point for MSM of extraordinarily diverse backgrounds with high rates of non-injection drug use. This setting provides an excellent context for testing an innovative intervention among high risk substance using MSM who are in need of HIV prevention services. 