The escort services are available many places but it depends upon the customer and the service provider's credibility. As this is not legal in many countries so people are doing this by maintaining secrecy. You can't approach every parlor for providing the services because in this trade number of people involved whose connection towards sex business is nil.
If you want for a good chance of success then you have to take the experience of people like your friends and known who used the services in a particular place. There are some cheap parlours available who promised to give good service as per money but after payment they will not follow their commitment. This type of experience will definitely hurt you so be selective.
In some places including metros beautiful and professional girls/women/men joining the massage parlors which provide them job and also they earn good amount. Some of them also taking it a career or a side business. The people involved in this centers study the behavior very closely and after that they offering the option whether to go forward to blowjob, sex or shooting sperm or other type of fantasy.
One of my college friend explained about his experience in massage parlors. He told that in the beginning they were not open up for the services but after repeated or regular visits they gave good services. At the peak time the person who pay more can avail the best service provider. There is always chance of police raid or being caught. Sometimes these people recorded the videos so that you canot threaten them or use in adverse conditions. This reveals from the videos available on web.
Be prepared for every situation while offering your virginity to someone.