According to this article "Spitzer Scandal Sheds Light On Web Prostitution"
Or even know exists.
The online escort/call girl/"model"/prostitute scene isn't so hard to find, though. Just use Google. If the organic results don't fit what you're looking for, AdWords can help, too.
The truth is, investigating this scene is much like investigating the adult entertainment scene. The breadth, depth, and scope of prostitution available via online booking is staggering, indicating that just like the online porn industry, sex trade is not just a huge industry, but one that employs cutting edge marketing techniques, and one that apparently is thriving.
These call girl operations are well ahead in terms of online marketing and technology, according to the article. They have used all imaginable means to advertise their service and for the convenience for their clients. From communication, making arrangement and payment transaction. It's definitely high tech and it is even mentioned that these call girls operations are even making use of Web2 , ie social websites, social bookmarking , etc.
And perhaps it could be due to the practice of introducing friends using Web2 elements that Spitzer was introduced to the call girls service of "Empero's Club" ( pictured below). Or he could have found it himself through his online surfing. Well no one knows but what's striking is that the world's oldest profession has gone high tech and is still a cause of the fall from grace of a lot of powerful man.