This looks good, doesn't it?

This map can be found at one of the websites I have listed on the side here - www.opencarry.org.

As you can clearly see, carrying in a restaurant that serves alcohol is legal in the vast majority of states. IL does not permit carry by citizens at all, and WI only allows open carry in certain situations, so neither state should even count as prohibiting, as they have no direct law forbidding the carry of firearms specifically in restaurants that serve alcohol.

I find a bit of humor in the fact that AK and AZ require handgun carrying citizens to Carry concealed in establishments serving alcohol. At the same time, MT and VA require open carry into the same sort of restaurants. This seems to be a bit of a dichotomy.

Please note that most states require the carrying person to avoid drinking while carrying. A couple of states will allow one drink. At least one state determines the carrying party may drink while carrying - provided their BAC (Blood-Alcohol Content) does not exceed the legal limit for driving.

I suggest following the law as written in most states, Tennessee included - and simply do not drink while carrying a firearm. Or conversely, do not carry a firearm when you plan to drink.