The research literature on AIDS prevention efforts contains many repor
ts on the impact of intervention sessions. Little information is avail
able, however, on the success of various strategies to recruit clients
to attend these sessions. An assessment of the comparative impact of
money and other types of incentives on group attendance in two AIDS ri
sk reduction projects, in the Harlem area of New York City and in Clev
eland, OH, was undertaken. In both projects, injecting drug users and
the sex partners of injecting drug users were recruited to participate
in group sessions that focused on the reduction of AIDS risk behavior
s. Data on group attendance were analyzed for 838 people in the New Yo
rk project and 1,168 in the Ohio project. After the projects were unde
rway, attendance incentives at both were changed from money to food co
upons or gift certificates. Results indicated that a nonmonetary incen
tive was associated with a significant decline in group attendance. Co
ncerns regarding paying monetary incentives to injecting drug users ar
e discussed.