G-girl

Attracted by the spurious glamour of "working in Washington," thousands of "G-girls" flock to the city each year, to become low-wage, low-function office workers whose route to good times is the appeal of a young body.

Source: wiktionary

G-Girls were voluptuous, promiscuous secretaries, living in boarding houses on Dupont Circle and hanky-pankering with elected officials on Capitol Hill. Lait and Mortimer presented the G-Girl as a sort of perk for hardworking politicians; snuggling on laps in smoke-filled rooms and never, ever, ever saying “no.”

Source: wiktionary