Even if you haven't read the book, you'll probably recognize this line: "The first rule of Fight Club is you do not talk about Fight Club." It comes from Chuck Palahniuk's breakout novel Fight Club, which was immortalized in the film of the same title. The story follows an unnamed narrator who joins a secret society of white collar professionals as they meet in basements and bars to beat each other senseless. And where did Palahniuk get the idea for an underground society of recreational fighters? From right here in San Francisco, courtesy of the SF Cacophony Society. That's not the only piece of "cultural mayhem" the Cacophony Society inspired either — we can also thank their antics for Burning Man, SantaCon, and flash mobs. Hear the story behind the Fight Club/SantaCon connection tonight at Chuck Palahniuk and the SF Cacophony Society: Creating Culture from Mayhem. The panel features Palahniuk, who wrote the forward for the society's recently released Tales of the San Francisco Cacophony Society, along with society members John Law and Carrie Galbraith. There will also be a book signing with Palahniuk, bartending robots from RoboGames, and a blessing from the Sisters of Perpetual Indulgence. Definitely a club worth talking about.