In the STD incidence outcome study, groups of patients attending the participating STD clinics are randomly assigned to blocks of clinic weeks to either the intervention or control condition. A waiver of informed consent was obtained whereby no subjects are actively enrolled for this phase of the study. Through a retrospective review of existing medical records and STD surveillance registry data, we will determine and compare the incidence of new STDs over a 12-month period (on average) by assigned waiting room conditions.