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Nellie west, left, of Altoona, and AJ Singleton of Des Moines enjoy an impromptu Polka dance together during the midday Downtown Farmers' Market on September 21 in Des Moines. West, a 75-year-old Polka enthusiast, beckoned the passing Singleton, who happily joined her as music supplied by the Polka Club of Iowa played. "I don't know anybody who doesn't smile when they are around Polka music," West said.