Software engineer looking for hobby groups

Hey guys, I'm a professional software engineer working in Industrial automation. I'm wondering if there are hobby groups out there for coders to just have fun with, work on interesting projects in technologies other than they use professionally, that kind of thing. I'd love to explore game development or really anything novel, but I don't really have the time to see a project through on my own, plus I work better in a team and could use that sense of community in free time. Any suggestions where I might look?