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What could possibly threaten the humor of Dadaist Santas? Try torrential rain. SantaCon, an international festival of irrational exhuberance where people dress in Santa Claus costumes and converge by agreement at various bars around the globe took on San Francisco earlier today. While the weather was more ho-rrible than ho, revelers seemed keen to make the best of things, a quest enhanced by bar-hopping. Click through forGretchin Robinette's photos.