On my trip from EWR->DTW->LAX. I mentioned that it seemed that Delta stopped caring about the Newark Lounge. Now Detroit, they care about this one a bit more.
A bit more thought went into this lounge. Detroit is one of Delta's larger hubs with a lot of international and long-haul domestic flights coming out of here, particularly the A concourse. There is an "ExpressTram" that moves passengers across the straight away that is the A concourses 64 gates (12 of which are international gates). While zooming through these gates I don't think I have ever seen as many of Delta's 747's in one place.
With all of the passenger traffic here, three of Delta's four DTW Sky Clubs are located in the A concourse. One at each of the three ExpressTram stops. I went up to the A68 lounge only to discover it was closed. No good signage, I almost walked into the door, as did a dozen people after me. I hopped onto the ExpressTram and went down to the central Sky Club which was open...and crowded. If the crowds don't bother you it is actually a very nice lounge. Self-service bar, typical snacks and drinks but with maybe an extra 10%. Many alcoves you can hide out in and get some privacy or do some work. The interior must have been done recently, beautiful stonework and fire places. Beautiful bathrooms and showers (though I didn't go in a shower. There are only two and there seemed to be a long waiting list). My layover was for all of 50 minutes so by the time I had a drink and some food I had about 5 minutes to relax. But all in all, an enjoyable lounge.