This is actually super funny but I was at the MD Anderson in Sugar Land yesterday and all the signs on the doctors offices explicitly say no handguns allowed. That made me think that I need to get a SBR for my carry when I go to the doctor . haha. That for sure will require open carry. Their signs don't forbid open carry just that you don't have a handgun.
Is the location subject to
Sec. 46.03. PLACES WEAPONS PROHIBITED.
(a) A person commits an offense if the person intentionally, knowingly, or recklessly possesses or goes with a firearm, location-restricted knife, club, or prohibited weapon listed in Section 46.05(a):
…
(11) on the premises of a hospital licensed under Chapter 241, Health and Safety Code…
If so, signage is irrelevant.