This study reports an analysis of 901 billboards in San Francisco, Cal
ifornia. The study examines how billboard advertising of alcohol and t
obacco products uses the social aspects of smoking and drinking to pro
mote positive product attributes. We suggest that the modeling of soci
al cues can serve to motivate product use, disinhibit behavioral restr
aints, and reinforce existing habits. The data suggest that alcohol an
d cigarette advertisements are more likely than ads for other products
to depict people, use models of the same race as the audience, use so
cial modeling cues such as anticipated rewards, and make use of attrac
tive models. This understanding of social influence and modeling on bi
llboards can provide health professionals with information regarding t
he strategies of alcohol and tobacco advertisers that has important im
plications for prevention and cessation interventions.