Texas 51% Signs:
51% sign means NO
carry in the building, period.
Then there is the blue
NOTICE signs, these are posted at places like Applebee's that sell alcohol for on-premesis consumption but they do not derive 51% or more profit from alcohol sales, these are welcome signs for CHLs, they simply say that it is a felony for anyone that does not
have a license to carry a handgun on the premesis.
The bar portion of a restaurant would not be off limits, unless it's separated from the main part of the restaurant and posted 51%.
Lastly, there are blue
WARNING signs posted at places that sell alcohol but NOT for on-premesis consumption (Walmart, convenience stores, liquor stores), they simply state that it is a misdemeanor to consume alcohol on their premesis, perfectly legal
for CHLs to carry there.
You can sit in the bar area of restaurants if they are not 51% places as for how places know whether they are 51% or not, I would assume that is known by what type of establishmet they are going to be (more of a bar than eating, or more eating than bar),
We tell CHL students: "If it looks like a bar, sounds like a bar, smells like a bar and everyone's drinking... it's a BAR, don't carry" and "If you could take your kids and mother there for dinner, it's a restaurant, don't worry, you're OK."
Remember, its illegal for CHLs to become intoxicated while carrying, and intoxicated means having alcohol level of .08 or higher OR loss of physical or mental capacities.