This is just blatantly untrue.
The gun-free zone where liquor is sold by the drink is state law, not a club rule. The club did not take their guns away, Florida did that.
There was an off-duty officer, hired by the club, who was armed. What part of that corresponds with "the Club didn’t provide armed security?"
Now, the club may not have provided what you consider to be enough armed security, but they did have armed security. OTOH how much armed security should a nightclub provide?
Did the off-duty officer survive?