Cyburbia is a friendly big tent, where we share our experiences and thoughts about urban planning practice, the built environment, planning adjacent topics, and anything else that comes to mind. No ads, no spam, and it's free. It's easy to join!
Of course, it doesn't hurt to check the web sites of cities that you want to consider. In addition, you might look at city and county associations, public administration, and community or economic development organizations. Here are a few I've bookmarked, which are not on Cyburbia (yet?).