freestyling

Picking up tricks in bars. Working as a hooker by hanging around bars (and casinos and similar places) to attract customers. Distinguished from streetwalker (it's indoors), call-girl (it's in-person), escorting (no published ad), sugaring (one-time session), pick-up (it's for pay).

Around Vegas there are often plenty of girls freestyling, besides the hookers with ads.