Pattaya police raided a pub and rounded up 15 customers who tested positive for drugs early Thursday.
When the authorities arrived at about 3.30am, Dragon Man Club in tambon Nong Prue was still open. Some 50 revellers were drinking alcohol and dancing.
The officers checked the ID cards of all customers. In urine tests, 15 of them - 14 men and one woman - tested positive for illegal drugs.
In a search, many plastic sachets containing powder believed to be drugs were found hidden in staff lockers. Many condoms, most of them already used, were found.
The Bang Lamung district chief said the pub was operating without a licence, opening beyond the closing time and allowing use of drugs.
He said he would recommend the venue be closed for five years.
