I'm curious:
Why do they specify no CONCEALED weapons? If it's concealed, how would they even know? And why only concealed carry weapons? So I guess open carry is OK? LOL.....
It’s odd, but I would venture to guess that it is their weak attempt at trying to escape liability, AND to promote a “family friendly” environment.
If they are just trying to keep undesirables out that are illegally carrying, they could evict them on the basis of their rowdy/impolite behavior. Also, these folks are ALREADY breaking the law – so a sticker won’t stop them from doing something else. It can’t be just to remove the baddies AFTER a shooting, because everyone will have a lot more to worry about then.
So, the thought might be to say “we are not responsible for anything involving the shooting because we prominently displayed a warning that no concealed weapons were allowed on the premises.” This argument probably won’t go too far, but…
The other thing is a little odder. For a lot of people, if they see a sign saying “no guns allowed,” they will take that to mean that it is safe inside that establishment. That doesn’t mean that it is safe – but they may THINK that it is safe.