Once the scourge of CEOs and boards, Carl Icahn has a new nemesis: hundreds of Florida club members, who claim he squeezed their golf-and-beach paradise for profits.

In 2009, Carl Icahn, a famous billionaire investor, strongly criticized corporate boards of directors and their lack of oversight of CEOs, blaming them for many of Wall Street’s financial troubles.

Carl Icahn at a DealBook conference. Icahn has put most of his holdings in Icahn Enterprises itself. The MLP owns 406 million shares valued at $6.7 billion, or 61.8% of the portfolio’s total ...