George Soros — the Hungarian-born hedge funder worth $14 billion — marked his 80th birthday Saturday under a tent at his Southampton estate with 350 friends. Danish chef Bo Bech flew over from Copenhagen to feed the likes of diplomat Richard Holbrooke, Washingon Post heiress Lally Weymouth, Chicago socialite Sugar Rautbord, billionaire Wilbur Ross and his society scrivener wife Hilary Geary. Soros, who was surrounded by his five offspring, told the crowd: “I am a philanthropist. Some maybe think I’m a philanderer. My philosophy is very simple. I like to make a lot of money, so I can give away a lot of money.”