There are only a couple more weeks of foie gras sales in local restaurants, and, tonight, Chicago Chefs for Choice celebrate the swan song of this controversial ingredient. They're holding a festival at Allen's Cafe, where "guests will have the opportunity to enjoy a variety of foie gras preparations, beverages included." It won't come cheap, of course: admission is $150 a person. Still, they've cloaked themselves in the First Amendment -- proceeds benefit the "Freedom of Choice Fund" -- and who can say no to that?