Simple. A group of ~10-20 of us all meet at lunch time on Tuesday and proceed to attempt to rip each others legs off in the span of ~35-40min. Sometimes known as "Breakaway training", but more commonly known as "The Hammerfest".

The thing about the course we take is that there are 2 turnarounds. So, even if you get dropped...you still have a chance to hop back on and punish yourself some more

Besides, you can make ANY group ride more "stochastic" if you feel like it