This is in error, apparently. The article linked to says:
You can carry into a bar, IF the bar owner does not choose to post against it, and IF you do not consume alcohol while armed.Both the Tennessee House of Representatives and the Senate have overruled a veto by Tennessee Governor Phil Bredesen on a bill that makes carrying handguns into bars legal, it was announced Friday. Consuming alcohol while carrying a handgun will remain illegal, but those with a permit to carry a weapon will be allowed to do so in any restaurant or bar. Owners can still opt to ban handguns from their establishments.
I have no problem with this at all. Carrying while drinking I would have had a problem with, but that remains illegal according to the article.