Chicago Incall Escorts - The Eros Guide to Incall Chicago escorts and Incall adult entertainers in Illinois. A call girl or female escort is a sex worker who (unlike a street walker) does not display her profession to the general public; nor does she usually work in an institution like a brothel, although she may be employed by an escort agency. The client must make an appointment, usually by calling a telephone number. Call girls. a termed generally used by escort services in their ads. Meaning: the escort is able to go "out" to your home or hotel, or she offers her services "in" her home or hotel room she has for the time her services are offered.