1) If there are no registered users: it will depend on the maximum capacity. If it is not full, the registration will be opened until 4 hours prior to the start hour.

2) If there is some registered users: the deadline for new users to be registered will be opened until the experience starts or until the maximum capacity is reached.

Thus the users will have time to register at the last minute, but also everyone will know if the experience will take place or not.

If you want to sign up and there are less than 4 hours until the experience stars, you must contact the organizers to ask them if there is any chance for you to sign up. There are contact buttons for you to talk to the Host and the Professional.