Three women and a man have admitted planning to make £50,000 by offering the sexual services of trafficked women to rich clients.
The gang used a picture of a 14-year-old girl to attract clients and brought women aged 17 to 22 to London last September to provide sexual services.
Mahrookh Jamali, 41, Sara Bordbar, 43, and Fatima Hagnegat, 24, and Rasoul Gholampour, 30, admitted trafficking the six women for sexual exploitation.
All four will be sentenced on Tuesday.
Harrow Crown Court heard the women were asked to offer themselves to clients.
The three women - Jamali and Hagnegat, from north-west London, and Bordbar, of Wigan, Lancashire - also admitted conspiracy to incite prostitution for gain, but the charge will lie on file for Gholampour, also from Wigan.
The judge ordered a charge of conspiracy to arrange the prostitution of children to lie on file of all the defendants.
In an undercover operation Metropolitan Police officers posed as potential customers after the gang left a letter at a hotel offering their services.
The court heard how the four were arrested after Jamali was asked to travel to the Lancaster Hotel, in Bayswater, west London, with four or five girls.
Bill McGivern, for prosecution, said the women, who were transported from the North West to London, were asked to offer sexual services to clients after dancing for them.
One officer said Jamali asked for £50,000 for each girl and said they could be "broken in" by the client, which they said clearly suggested they were virgins.
There was no evidence that the 14-year-old was to be used as a prostitute by the gang. The use of her picture as bait was an "aggravating factor" of the case, the court heard.
He said: "This was a case where there clearly was corruption, but no coercion or threats. There may have been pressure as well.
"But it was pressure in the sense of: 'You have come down, this is what you get if you go further than a simple dance'."
Gholampour had pleaded guilty to possessing extreme pornography during a hearing at Southwark Crown Court in July.
Dee Connolly, representing Jamali, said no sexual services were sold and that no money changed hands.