Dance clubs (ballroom, jazz, ..) in the US and Canada sometime require participants to sign a waiver. Briefly, the waiver says: "Dancing is inherently risky. I hereby waive injury rights."
Dance clubs do this to avoid getting sued out of existence if someone is injured on the dance floor. The liability is on those who injured them, not the organizers of the dance club or the dance club itself.
My question is: For this statement to be binding, does it need to be accompanied by a date of birth and a confirmation of participants' IDs? Could the process be simplified by adding this statement to a web site and stating that "By clicking here, I certify ..."? (If a web form suffices, how can the organizers confirm this was not added after the fact?)
I have the impression that in North America people generally consider their DoB private and will not be too glad to write it for something such as a dance club. Ironically, and despite the frequent noise in the news about how privacy rights in Europe are stringent, the culture there tolerates asking participants in something as innocuous as language courses to write down their DoB, which people there gladly, or at least habitually, do.