I might just clarify the 30.06 sign... that is the number for the particular law... the sign must be white background, black letters at least one inch high, and they must be in English and Spanish... so there are really two signs side by side. The wording is the exact wording of the particular 30.06 paragraph of the law.
Also, going into a restaurant where they serve alcohol at a bar area, they will have a sign just before you enter the bar area... the sign will be about the size of a sheet of typing paper, and will have a large 51% (shaded letters) as the background to the wording. Just don't go into the bar area, itself...
Charlie gave you a good rundown of the Amarillo entertainment places... especially the Air & Space Museum and the Big Texan Restaurant...