Sex club/party attendance and STI among men who have sex with men: results from an online survey in New York City.

Compared with those who had not done so, MSM who attended sex clubs/parties in NYC in the prior year were not only more likely to report past-year STI diagnoses but also more likely to report PrEP use or recent HIV/STI testing. Sexual health promotion among MSM who attend sex clubs/parties should address STI risk and prevention.