Me too :) For the life of me, I can see no reason to apprehend or arrest a person in a hotel bar. The patrons, and the hotel should litigate this. The hotel is likely to pass on a legal challenge, for a valid fear of having TABC revoke their license. The patrons/hotel guests may have some basis. Although I do not think that they will be looking forward to any free drink coupons at check-in anymore!
The guest who was on Mike Gallagher's radio show said he will not be staying in Irving anymore. When the host informed him that TABC stands by this policy statewide, he said he may think twice about going to Texas.
Convention business will suffer when out of state visitors get prosecuted by overzealous police forces looking for $350-500 fines.