I spent a few days last month in downtown Detroit at CNU 24. CNU is smart enough to host their annual “congress” in and around the city. We spent not a single moment in a conference center, but rather in beautiful old theaters, bars, parks, pop-up event spaces with food trucks, tables, vendors and Ping-Pong, and informal gathering spots. In other words, out in the city. Between walking to and from my hotel to various conference events, I observed and soaked up quite a bit of downtown life. I have to say, I’m very impressed. Detroit’s public realm and remaining building fabric provide a strong basis for…