I personally think everyone is reading too much into this.
The way i read it, dog tracks are legal, and since "gambling" is against Fla. Law except on indian reservations, that one could say that there is NO ILLEGAL GAMBLING at a race track, therefore, a race track is not a place of nuisance.
If i went to the dog tracks, i would carry, unless they had guards at the doors telling me i could not enter, then i would just go home, and SAVE MY MONEY>:rolf