The Chubb Group ( CB - news - people ).

FORBES: Litigation

Giuliani Partners has advised the likes of insurer Aon (nyse: AOC - news - people ), CB Richard Ellis, the real estate services firm, and Entergy (nyse: ETR - news - people ), the giant New Orleans utility.

FORBES: As a businessman, he's been mixing with a sketchier crowd.

One caveat to LLCs: If you're planning to build your brokerage into the next CB Richard Ellis Group (nyse: CBG - news - people ), be aware that it's difficult to go public using this structure.

FORBES: How To Run A Real Estate Brokerage: Legal Structure