yeah, that is kinda screwy.
one way to end-run that bit of idiocy is to charge an entry fee to the premesis (sort of a "membership fee), which makes the place a private "club"
I'll look into that, I don't know if even that would pass muster, if membership is open to the general public. Dunno. My church forbids carrying, and is within the law, because there is a provision for churches banning firearms if posted. OTOH, our teachers can carry concealed in the public schools.
BTW, you can carry concealed into a bar, but the threshold for possesion of a firearm while intoxicated is the same as for driving. You get caught with a beer in your hand, or have a BAC above that stated in the DUI statute (.08) while carring concealed is an offense. You'll lose your permit and have a gun related misdemeanor on yer record.
And what's worse, the local rednecks would probably tie you to a fence post and brand and flog yer useless butt for defaming gun owners for being stupid. (Son, we've found you guilty of public stupidity...)