According to a USA Today article,
An observational study done last month found that 85% of adults washed their hands in public restrooms, the highest number since the studies began in 1996. But it’s a far cry from the 96% of adults who say they always wash their hands in public restrooms, based on a separate telephone survey conducted at the same time. Men do a lot worse than women overall — just 77% scrubbed up, compared with 93% of women. But both numbers are up. The last time the survey was done, in 2007, only 66% of men washed, and 88% of women.
Needless to say, this is one unique and innovative way to get men to wash their hands a bit more frequently.