Turn tricks

By 1996, she was a hooker sleeping in the streets or at ratty hotels in Santa Cruz and San Francisco, turning tricks to get her next bag of heroin.

They were turning tricks, doing drugs, and generally little better off than they had been before, except that they were keeping more of their money. But they seemed lonely, too, without the company of their pimp and the rest of his string.

[…] two sisters we always see at the club have started turning tricks to pay for heroin.