During the angst of my teen years in Chicago, late at night in my bedroom, I would tune the Motorola radio on the night stand to the blues station. Strictly AM and totally acoustic stuff. This was long before anybody was doing electric blues. This was Delta blues and a particular genre that was distinctive Chicago blues. It was gritty and blue-collar and more than a bit ethnic. It was Howling Wolf and Muddy Waters and a very young B.B. King.
After about midnight, the DJ would unfurl an Inner Sanctum sound effect of a creaking door and set the stage for "going down in the basement." It got good then. I'd fall asleep to the classic cycle of a blues riff and occasionally wake at sunrise to find the station off the air and the radio humming softly.
It was a bit like this: