Singapore shd have one also. 
http://mpdc.dc.gov/serv/programs/john_school.shtm
On July 21, 2001 the DC Metropolitan Police Department, in
collaboration with the US Attorney's Office, Court Services and
Offenders Supervision Agency (CSOSA) , DC Department of Health, My
Sister's Place, Eleuthera Institute, Fulton House of Hope and
various community members, launced the first "John School" in
DC.
The "Johns" are asked to sign an agreement regarding conditions of
participating in the school and are required to pay a fee. The
school is intended to educate "Johns" about the problems inherent
in street prostitution, which include health risks and violence,
and how their activities can compound earlier abuse and
victimization suffered by many street workers. The "John School"
attendees are "Johns" who meet the criteria set by the US
Attorney's Office when they are arrested. The participants receive
information from a psychologist, survivors of prostitution,
prosecutors, police, health professionals, local residents, and
business owners. "Johns" learn how their activities contribute to
the wider problem of sex trafficking, as well as the harmful
consequences of prostitution with respect to crime, fear, and
health disorders. A licensed psychologist and counselor provide
information on sexual disorders, which highlights the fact that
many "Johns" have problems that require treatment.
In addition, all participants are afforded the opportunity to have
HIV and syphilis tests. These tests are entirely voluntary,
confidential, and undertaken by specialists from the DC Department
of Health.
Completion of the diversion program will result in the case being
dismissed, conditional on the "John" not being arrested for
soliciting for six months after the completion of the school. The
"John School" runs six times a year with a minimum of 20
participants expected for each class. The school will be operated
out of the Metropolitan Police Department's Maurice T. Turner Jr.,
Institute of Police Science.
