Escort agencies are companies that provide
escorts for the
agency's clients. The agency typically arranges a meeting between
one of its escorts and the client at the customer's house or hotel
room (outcall), or at the escort's residence (incall). Some
agencies also provide escorts for longer durations, who may stay
with the client or travel along on a holiday or business
trip.[1]
While the escort agency is paid a fee for this booking and
dispatch service, the customer must negotiate any additional fees
or arrangements directly with the escort for any other services
that are not provided by the agency involved, such as providing
sexual services (regardless of the legality of these services).
A call girl or female escort
is a sex worker who
(unlike a street
walker) is not visible to the general public; nor does she
usually work in an institution like a brothel,
although she may be employed by an escort
agency.[1]
The client must make an appointment, usually by calling a telephone
number. Call girls often advertise their services in small ads
in magazines and via the Internet, although an intermediary
advertiser, such as an escort agency, may be involved in promoting
escorts, while, less often, some may be handled by a pimp.[2]
Call girls may work either incall, where the
client comes to them, or outcall, where they go to
the client.
http://en.wikipedia.org/wiki/Escort_agency