It is very common for escorts to enter the business through referrals from friends who have been in the business.
The effectiveness of ads in weeklies or specialized sites has been questioned by some operators as there are so many that they are diluted.
Some agencies also provide escorts for longer durations, who may stay with the client or travel along on a holiday or business trip.
The arm's length relationship between the escort and the escort agency is designed to protect the escort agency (to some degree) from prosecution for breaking laws against prostitution.
If the employee is solely responsible for arranging any illegal prostitution-oriented activities, the agency can maintain plausible deniability should an arrest be made.
Escort agencies often recruit individuals to work as escorts by placing employment advertisements in a magazine or newspaper.
Escort agencies typically maintain a list of escorts of different ages and appearances to cater to the varying interests of clients.
These pictures are posted on the agency's website or circulated among clients to promote business.