Are there listings for "hackery" events in major cities? I know that can mean one of many things, but I always find out about similar events after the fact. He

Are there listings for "hackery" events in major cities? I know that can mean one of many things, but I always find out about similar events after the fact. Here, I mean anything related to programming, hacking, art, visualization, culture, book clubs, etc; ee tend to share similar interests. Any gatherings you guys can pitch?