Two things,, first, everyone has fun at these rides. I think some of the crowd might even get the idea of going out to buy a bike with all the excitement. And of course the riders always enjoy these events. Second,, I noticed how crowded the riders were at times, some even three across which makes for a bad accident to happen. I don't participate in these rides anymore, not knowing how habits of the drivers around me. JMO.
For me the largest ride was the Miracal Ride for Riley Childrens Hospital in Indianapolis Indiana. When I attended the staging area was at the Indianapolis Motor Speedway. Bikers have raised tons of Money for the kids. Ironically I still got a ticket for parking my Harley in their Hospital Parking Garage.
Large group riding takes a lot of skill and patience IMO:s