The richest man in Great Britain was a customer of the same high-end prostitution service patronized by Gov. Spitzer. The Duke of Westminster, listed as the world's 46th richest person by Forbes magazine, hired four hookers over a six-week stretch in late 2006 and early last year... Despite his incredible wealth, multi-billionaire Gerald Cavendish Grosvenor haggled with one of the Emperors Club girls for the cost of their date... Prostitute Zana Brazdek, then 26, described the 56-year-old Grosvenor as dull and demanding. The court documents that took down Spitzer and identified the disgraced governor at "Client 9" also included information...