@Mmaudio thanks for reaching out! Could you give us a little more information about the event you're interested in? In general, as long as you are understanding of the possibility that there may not be space for you to participate, you can always show up in the hopes there are no-shows. If it's an event at an REI store, our recommendation would be to call the store ahead of time and get their perspective on the likelihood of there being space for you. Hope that helps!