We have Partial Preemption in Louisiana... Laws on the books before 1985 are grandfathered in.
See- RS 40:1796 Preemption of state law
No carry allowed in any place which sells alcohol for on site consumption.
See- RS 14:95.5 Possession of firearm on premises of alcoholic beverage outlet-
All this and more in the Legal Center section of the Louisiana Open Carry Awareness League discussion forum at