Drugs were freely available at the Future Music Festival Asia in Kuala Lumpur where six Malaysians died of an overdose and 15, including nine Singaporeans, were hospitalised.
Singaporean Farah Junita, 25, who works in the oil and gas industry, told The New Paper that she was offered Ecstasy by a man at the event.
She said: "My friend was lying down on the floor when the man came to us and asked us what we were on.
"I told him that we weren't taking anything and he told us that he had Ecstasy to offer us," she said.
She brushed him off but he said that if she changed her mind, she could look for him in one of the tents on the festival grounds at Bukit Jalil Stadium.
The three-day festival which started on Friday was cancelled by police on Saturday.
Cheras police chief Mohan Singh said on Monday that 29 people had been arrested for drug-related offences. Fifteen of them are foreigners. TNP understands that they include nine Singaporeans.
Miss Farah said: "There were so many people who were high. And it was not alcohol - I believe they were high on drugs like Ecstasy. "There were people grinding their teeth and sucking on lollipops," she said.
Miss Charlene Low, 24, another Singaporean who attended the festival, was approached by two people who offered her some pills. The public relations associate said: "At about midnight, two guys came to us and told us they were high on some pills.
"One of them then asked my friends and I if we wanted some," said Miss Low.
"I told them that they did not look high and one of them lifted his sunglasses. He looked like he was pretending to look high by widening his eyes and rolling them to the back of his head."
Miss Low rejected their offer, and the men, who were dressed in black T-shirts, walked away. She did not know what the pills were.
Another festival visitor, who wanted to be known as Sara, said that she also saw people who were clearly high on drugs.