Every Sunday from April to October, a stretch of Memorial Drive in Cambridge, Mass. is closed to motorists to create "Riverbend Park" -- a car-free road for the use of cyclists, rollerbladers, skateboarders and pedestrians.
Today was the second time we went. The route is rather short (I think it is a 1-mile stretch?), but we wanted to support the initiative. The lanes are wide, so we were able to ride next to each other and talk. It was nice, though tamer than the kind of cycling we usually do. Once you get used to cycling in traffic and/or for long stretches, this sort of ride can feel restrictive.
I know that something similar to this event exists in Chicago and other cities. Do you make it a point to go to yours? Do you see these as beneficial?