Last weekend I roller-bladed 12.5 miles around London in a group of over a hundred people. The friday night skate really is great fun. It’s very well organised. They have ‘marshals’ wearing luminous tops, who keep everyone together, and stop the traffic while everyone zooms past. They have a map of the weekly route, weather cancellation information on the website. The route is always in two halves, the second half being faster, for the better skaters.
You have to be pretty good at roller-blading before you should attempt it, because they go fast and they huddle together in a big herd of inter-tangling legs, but if you are a competent street skater, and you find yourself in London on a Friday, I heartily recommend it!