The Old Bailey has been told that the men deliberately targeted vulnerable young girls, often those living in care and with troubled and unsettled lives.
They found girls who were "out of control" and may already have been sexually abused.
They would frequently approach the girls while they were playing truant from school or out having an illicit drink. The men groomed the girls by offering them alcohol, or sometimes by simply offering the kind of attention they craved and that was missing from their lives.
They would hook the girls in by plying them with drink and often gave the girls drugs, including cannabis, crack and sometimes heroin, which they then became addicted to.
More top news
The 2017 Oscars will be remembered as the year the wrong film got the best picture award, but it wasn't the first memorable mix-up.
The family of a girl who died of an asthma attack after a GP turned her away, are speaking out after the doctor only got a written warning.
An ex-boyfriend murdered a couple after he searched on google for videos on getting revenge and the lengths of sentence for murder.