Do I have a case if I slipped and fell on a racquetball court floor in a puddle of bacteria laden liquid?

You should consult an attorney. To properly evaluate the case, an attorney would need to read the contract, including that liability waiver, and to question you, in detail, about the circumstances of your alleged execution of that contract. Another necessary line of inquiry is the circumstances of your injury: it is quite possible that the liability waiver does not apply even if it is valid. The extent of your damages and the reasons you are bringing this issue up now, 8 months after the injury, also need to be examined. In sum, a general discussion on an open forum is not a right manner to address your problem. If you wish to pursue your legal rights in this matter, the gym's insurer will have an attorney looking after its interests; and so should you.

Slip and fall cases are, by their nature, difficult. First, you must be able to prove negligence on the part of the property owner/occupant. Negligence could be defined as the failure to use REASONABLE care; the owner is not a guarantor. To do this, you must be able to prove that the owner put the slippery substance there, or that they had prior knowledge of the hazard and failed to take care of it promptly. Second, they will claim "comparative fault", meaning that you had a duty to watch where you were walking, and thus are partly at fault. The result is that most lawyers are reluctant to take a slip and fall case unless there are substantial damages, and there are at least some arguments to be made on fault.

Consult a premises liability lawyer. He or she will have to get more info on the facts of the accident and read the waiver.

I doubt it, you need to get past all the emotion and claims of forgery and sit quietly with a knowledgeable attorney. Why would you go on a floor if it had a puddle of water on the court. if it was open and obvious you don't have a claim. And how do you know it was laden with bacteria unless you have had a chemist analyze it cool the rhetoric and get some good advice based on facts.

All property owners have a duty to keep their property in a reasonably safe condition. In order to pursue a claim, you would have to show that the property owner knew of the hazardous condition, or should have known of it, or that it created the condition. I can't figure out what bacteria laden liquid has to do with electronic funds transfer or contract forgery.