The event I want to volunteer for is full. It doesn't have a wait list, but I really wish to attend. How can I register for this event?
You can do is contact the event manager(s) for any specific event that you are interested in and ask them if they might be able to add you. You can find the event manager by clicking on the title of an event which will take you to the event details page, there you will find the event manager(s) listed on the right. Clicking on their name will bring up your email client and you can send them an email regarding the event.