You might find this in many cities. There are street bicycle races around here a few times a year, always good for color and action. These people are impressive athletes who take risks - I've seen a couple of wrecks. Not for me though. The last time I rode a bike I had to get a steroid shot in my knee.
Witness City Daily pedal power from around the world at https://citydailyphoto.org/category/theme-days/ .