a massage therapy or group of that client's need

A person who exchanges sex for money (commercial sex worker), drugs, shelter, etc. May refer to persons of any gender or sexual orientation.

Catch all phrase sometimes used to describe prostitutes. May also be used in the context of strippers, peep show workers, topless waitresses.

Prostitutes, strippers, peep show workers, phone sex operators, topless waitresses etc. taken together.

A sex worker is a person who earns money by providing sexual services. The term was coined by American prostitute-activist Carol Leigh (also known as "Scarlot Harlot") in the 1970s as a political term. It is sometimes used as a synonym or euphemism for prostitution, but most scholars define "sex workers" to include individuals who perform sexual or sexually oriented activities in the sex industry, such as strippers, erotic massage therapists, rubberists, pornography actors and actresses, live sex shows, webcam shows, and phone sex operators(Weitzer 2000).