Waivers don't do shit really, A waiver regardless of what it says cant stop anyone from taking you to court thus incurring the expenses of the legal system. They are also easily over turned in court if a person can demonstrate that the place did not provide a safe environment.(thats some pretty lose terms, think about it.. What we practiced your honor? Oh uh, how to break someones arm sir.. What training do I have to teach this? Well sir.. I watched some shit on the internet..) You want to cover really cover your ass id suggest insurance.