It's an 'open' event which tends to be a bit more serious and requires entry in advance. 'Club' events tend to be a bit more casual, entry on line etc.
Hmmmm. Wondering how bad a twat who's main cycling is commuting, on a self built steel tourer, running a triple chainset and 28mm schwalbe marathons is going to fare. :)
Do people just turn up for a laugh or is it all serious cat 2/3 types?