People gather at community centers for theater, youth activities or to share their golden years. Why not do the same for politics? A group of Contra Costa County Democrats has launched an initiative to open a year-round community center devoted to their party. It appears to be the first of its kind in the state. "We want to create a venue where individuals who are Democrats or curious independents or Republicans go and learn about Democratic core values," said Terry Leach of Lafayette, a veteran local and state Democratic Party volunteer. "We know people often feel isolated in their political...