No less an authority as the Freakonomics dudes offer an article about "A Call Girl's View of the Spitzer Affair" Read this Q & A and many more like it.
"Q. Have you ever had a client as powerful or well-known as Eliot Spitzer? (You haven’t had Spitzer himself as a client, have you?)
A. I have clients that are professional athletes,artists, and entertainers. They are probably better known, but obviously not as powerful. I don’t believe I have ever seen Eliot, or as I like to call him, Number 9." (from A Call Girl's View of the Spitzer Affair)