Does the TX law also require those establishments to allow firearms to be checked in somewhere? Indiana does.
If you go to a casino (boats) in Indiana, you are required to “check-in” your weapon at no charge. You go to a window, unload and present your firearm and are given a receipt. Upon pick-up of the firearm, you are required to show your license.
Texas does not account for checking in firearms. Generally, it's "leave it in your car" or "leave it at home if you plan on drinking."