Advertisements for escort agencies often carefully skirt the legal line, and avoid specifically offering prostitution or sexual services.
Sometimes, it may be up to the escort to contact the client directly to make arrangements for the location and time of an appointment.
Generally, the escort is also expected to call the agency upon arrival at the location and upon leaving, to ensure the safety of the escort.
These pictures are posted on the agency's website or circulated among clients to promote business.
Some larger escort agencies maintain websites with photo galleries of their escorts.