The Bucks Free Press (in the UK) reports on police activities to determine if pub/club visitors have taken anything illegal before coming to the pub/club.
“A STATE-OF-THE-ART drug detection kit is to be used for random tests in pubs, bars and clubs across Wycombe in a partnership between police and landlords to improve people’s safety on nights out. The £30,000 machine tests for cocaine, heroin, cannabis, amphetamine, methamphetamine and ecstasy. Called an Ion Track Itemiser, the portable testing kit analyses swabs that have been rubbed over a person’s palms. It was first tried out at Pure nightclub in High Wycombe recently, where 12 clubbers - out of 135 tested - proved positive for cocaine use and were refused entry to the club. Those who tested positive were also searched for drugs, but none were found.”
The comments at the end of the article do reporesent a range of feelings.
Apparently these machines are also installed in many airports to test for explosives.