Here's another site where you'll find maps and locations to the real thing while down in the delta. Junior's Juke Joint(clickit) will take you to the bluesiest roadhouses down there.
This is what Junior tells us is the major differences between a southern honky-tonk and Delta Juke Joint:

• The race of the customers.
• The race of the girls in the beer posters.
• The predominant type of music on the jukebox.
• The price of beer.
• The amount of violence.

Check him out, he's got the best written blues site on the internet and you may find some places you can visit along the way.