From the New York Times on Spitzer:

The governor returned to his apartment after his abbreviated statement Monday, where he played host to his sister Emily, Mr. Baum, Mr. Constantine, Michele Hirshman, who was his lawyer and a top aide when he was state attorney general, and his friends, George and Pam Fox. So close was Mr. Spitzer with Mr. Fox that he had used his name as his alias when checking into the Mayflower Hotel in February for his liaison with the prostitute.