When I am sitting on a barstool at the tavern drinking beer, I like to listen to old school country.
Buck Owens, George Jones, Hank Sr., Johnny Horton, Junior Brown, Waylon, Merle, Willie....you get the picture.
The alternative country stuff gets played a lot at home...I especially like the Gourds' cover of "Gin and Juice."
Hard rock is good driving music, and getting stuff done around the house and garage, but not necessarily very good beer drinking music.
The Blues is more for drinking whiskey.