Chicago Blues Music

What type of people are generally attracted to classic Chicago Blues music of Chess Records fame?
What demographic or group of people are most moved by classic 1950s era Chicago Blues, made famous by Chess records of Chicago, Illinois.
I'm talking about music from the likes of Muddy Waters, Little Walter, Elmore James, etc.
What kind of people dig this stuff the most?
The Rolling Stones for one. They recorded five songs while on their first US tour at Chess.
Chicago Blues Mandolin Instruction