You've been listening to Sgt. Spreader of Silly Stories Swanton too much that the Cosacks weren't invited. All you have to do is search for motorcycle events and you'll find it scheduled months in advance and open to any and all. These are not closed meetings. Wow, here's one URL that actually states "PUBLISH_PUBLIC".
http://localendar.com/elsie?JSP=PublishedCalendar&mode=PUBLISH_PUBLIC&search_type=M0&start_date=05/01/15&calendar_id=174935
Nothing at your link indicates the CoC regional meeting was open to the public.