Men attending four Seattle gay bars were asked to complete a self-admi
nistered questionnaire including measures of sexual behavior, percepti
ons of peer norms in the area of sexual safety, personal human immunod
eficiency virus (HIV) risk estimate, and knowledge and use of a variet
y of acquired immunodeficiency syndrome (AIDS) prevention services. Tw
enty-nine percent of the sample reported engaging in unprotected anal
intercourse at least once during the 2 months before the survey. Diffe
rences in peer norm perceptions, age, HIV risk estimate, and intent to
be sexually safe in the future were found between those engaging in u
nprotected anal intercourse and those not reporting unprotected anal i
ntercourse. No significant differences were found in level of educatio
n, use of AIDS prevention services, and whether or not a person had be
en tested for HIV. Implications for prevention programs are discussed.