Quoted from Methos:
If you are that concerned, maybe you shouldn't hold any events.
I will not sign any paper that attempts to waive my right of recovery due to someone's negligence.
It is a question worth discussing. Many of us host events, often opening our homes to people we may have never even met or only know from a few meetings or via friends of friends. When doing so there is some inherent risk, a risk I had not really considered before hearing of a legit slip and fall case in a business.
Also some really good advice in here that a waiver may mean little and insurance combined with an umbrella is likely the best thing to have as a CYA.
I have done a bit more research and it appears WI has a few cases where the courts have sided on the idea of common sense and assumed responsibility when you are a guest on private property. In other words, in WI a good insurance policy (with umbrella) combined with the state supreme court position that any guest has a certain level of assumed risk/responsibility on a private residence where they are a guest should be plenty in the case something ever happened.
A waiver may be a smart idea also as it could be helpful to show the risk was at least acknowledged in advance. If that means you are unwilling to attend an event that has a waiver, that is of course your choice.
I personally have no issue if someone inviting me in for a pinball event had me sign a waiver. Then again, I would never sue someone when I was a guest in their home so I dont have a problem signing away that right.