"Pretty girls, they could be models. It's pretty disgusting," said Annmarie Castro, a neighbor.
Prosecutors say those pretty girls were really prostitutes who were working out of a first floor apartment in a building on East 50th Street.
Neighbors say at night they've seen more than a half dozen men lined up in the hallway waiting to go inside.
"You come in there, lined up to go in one by one," Castro described.
The criminal complaint says the ring was run by 42-year-old William Thomas.
It says he adverted on the websites site e4akorea.com and e4anyc.com.
During an undercover sting at the apartment on 50th Street, a detective said, "I observed a large apartment with multiple beds, occupied by five women, including the above mentioned women. I recognized 'Olivia' as one of the women advertised on the E4AKorea website."
"We don't know who they are, saw them doing laundry, bag after bag of linens," Castro said.
But the apartment on East 50th is just one of multiple locations men could live out their sexual fantasies with Asian women, according to investigators.
They say men also went to a third floor office space on Maiden Lane for sex.
The website offers women therapists for $200 to $300 per hour, uses acronyms like f/s for full service and "GFE" for the girlfriend experience.
It also shows one woman in lingerie with the caption, "What r you waiting for?"
Thomas lives in a first floor apartment in Fort Greene, where neighbors say they haven't seen anything suspicious.
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