They show up on my map as green circles. When I select them they display the name of the club. That being said I assume they're all an air field of some sort. I assume that because there's one that I know is an airfield.
Another Detroit suburb guy here. I like flying at Dodge Park but there are quite a few nice places to fly really. I use an app called "Airmap" to identify some hobbyist airfields and such.
