This presentation examines the efficacy and effectiveness of a Centers of Disease Control and Prevention evidence based intervention (3MV) aimed toward lowering HIV/STI rates among Men Who Sleep with Men (MSM) of color (Hispanic and African American. Literature on this population suggests that many MSM of color do not identify as gay, and also have disproportionately high rates of HIV/STI’s. Although a major study (Wilton et al, 2009) has evaluated the efficacy of the program, this evaluation adds to the corpus of evaluation knowledge through the use of mixed methodology (quantitative surveys and focus groups) and anthropological observation techniques to go beyond merely assessing the efficacy of the program itself. This evaluation will examine the participants levels of satisfaction in the program, and combine participant and staff insights to understand how the program can be better improved, and more readily adapted to the cultural context of Tampa, Fl . Moreover, the combination of collaborative evaluation and anthropological evaluation lend themselves well to improving the functionality of evidence based intervention for marginalized populations. #MultiethnicIssuesinEvaluation #Collaborative,ParticipatoryandEmpowermentEval #2010Conference #Lesbian,Gay,BisexualandTransgenderIssues