One of the things I used to like about organized rides is seeing new territory and meeting new people.

I don't attend them as much nowadays, as I have a lot of friends who cycle, and we just kinda organize our own rides ... there are usually 2-3 going on at any time with different groups. Not dissing the ride organizers, but $100/ride would get rather expensive pretty quick, and at this point, we really don't need all the support they provide.

I think they are really good for people making the transition from casual riding to more serious stuff ... longer distances and hillier terrain.

And add my vote for the post-ride festivities. If and when I organize a ride, you can bet a post ride meal will be part of it. The banquet debrief of the adventures of the day is the best part, IMHO.