Would you or have you visited any after clubs. They only ones that I have heard of in my area were open illegally. Operating without licenses, serving alcohol, had gambling machines, etc. They did not open until 2AM and stayed open until around noon. They seem to be meeting places for guys trying to make OTC hookups when all else failed.
I'm usually safe at home by that time of night and I don't think that the lure of nude strippers willing to do OTC would change that. I'm too old for that shit!
There seem to be a lot of after hours clubs ("blind pigs") in Detroit, but I've never visited one. I think you have to be invited.