Reported rates of recreational drug use among gay and bisexual men are currently rising. Although there has been much empirical research documenting current trends in drug use among gay and bisexual men, little research has empirically contrasted differential rates across urban epicenters, while even less has addressed racial or ethnic variation (between and within cities). This knowledge is essential both for the development of effective culturally-sensitive health education prevention/services and for understanding drug use prevalence among urban epicenters. Using the men's data gathered from large-scale gay, lesbian, and bisexual (GLB) community events in New York and Los Angeles in the fall of 2003 and spring of 2004 (N = 2,335), this study explored racial and ethnic variance in the use of methamphetamine, cocaine, MDMA/ecstasy (methylenedioxy-methamphetamine), ketamine, GHB (gamma-hydroxy-butyrate), marijuana, and nitrate inhalants (poppers) among gay and bisexual men both "between" and "within" cities (NYC and LA). Levels of recent drug use were fairly consistent between New York City and Los Angeles; however there was some "between" and "within" city racial and ethnic variance. In particular, Asian/Pacific Islander men were among those least likely to report use of some drugs. Findings suggest substance use in the gay community permeates geographic boundaries in addition to some racial and ethnic boundaries such that interventions targeting drug-using gay and bisexual men should appropriately attend to racial and ethnic diversity within communities. (Contains 4 tables.)