Florida statute 768.81
2) EFFECT OF CONTRIBUTORY FAULT.—In a negligence action, contributory fault chargeable to the claimant diminishes proportionately the amount awarded as economic and noneconomic damages for an injury attributable to the claimant’s contributory fault, but does not bar recovery.
A premises does not have to make the area 100% foolproof. That is pretty much impossible. To win any negligence suit you will first have to prove the establishment was negligent in their actions. That would start with serving you. In itself does not cause the bar to incur culpability. You will have to prove they were negligent in serving you. Generally culpability won’t attach until you are served to cause you to become, for lack of a better term; stupid drunk. adjusterjack has posted statutes the state’s for most issues, a bar is not liable for serving you. That is likely to remove serving you from being used to cause liability.
Then, if you are successful there you will have to prove they created or allowed a dangerous condition to exist. In itself making a shallow pool is not negligent. It would require something greater such as creating a shallow pool and not acting to warn or sometimes actually prevent a person from diving into that pool. Signage is one means to avert culpability but often not enough. Fencing or other types of guarding, such as a rope, to indicate they do not allow passage beyond that point and especially if there is signage used in conjunction is often adequate to remove culpability for injuries caused due to some condition that would otherwise be negligent.
While one should never say never, it would appear based on the minimal fact set presented, successfully suing anybody and not having your negligence reducing the amount greatly is going to be a tough journey.
Best of luck but sometimes people really do have to accept responsibility for their own stupid decisions. You may be in that situation yourself.