Florida knife laws (from the 18 hours I put into figuring them out) are you can carry any non federally restricted knife (i.e. switch blades, gravity knives and butterfly knives) unconcealed, if you have a concealed carry permit then you can carry up to a 3.9" folder concealed, 4" folders can't be concealed.
"790.001. Definitions.
(3)(a) "Concealed weapon" means any dirk, metallic knuckles, slungshot, billie, tear gas gun, chemical weapon or device, or other deadly weapon carried on or about a person in such a manner as to conceal the weapon from the ordinary sight of another person.
(13) "Weapon" means any dirk, metallic knuckles, slungshot, billie, tear gas gun, chemical weapon or device, or other deadly weapon except a firearm or a common pocketknife."
As far as fixed blades go, no concealed carry, but you can walk the streets with a katana, machete and broadsword, without getting hassled by the cops (depending on the area, no-go in inner cities), but people regularly carry machetes into hardware stores without anyone giving it so much as a first thought. Banks are obvious, no sharp pointy things, just like airports. Theme parks are worse than airports and courthouses, at least at a courthouse or airport they give you the option to go put it in your car.