Yet another Facebook founder’s tied the knot. Chris Hughes — who started the social networking site with Mark Zuckerberg, and recently bought The New Republic — married Sean Eldridge Saturday. After an intimate backyard ceremony, they later celebrated at Cipriani Wall Street, where spies said guests included, Zuckerberg, Sean Parker, Newark Mayor Cory Booker, Sen. Kirsten Gillibrand, Gayle King, playwright Tony Kushner, City Council Speaker Christine Quinn, Sen. Chuck Schumer and House Minority Leader Nancy Pelosi. The fete, planned by Bryan Rafanelli, featured, a big band jazz orchestra and vanilla wedding cake, with chocolate ganache and pistachio icing.