I didn't think about explaining what's a "sketchcrawl", Someone called Enrico Casarosa started it in S.Francisco. He started going out for a whole day sketching, anything and everything, breakfast leftovers, cats, the neighbours house, to streets, museums, whatever. Then he started doing it with some fellow artists and then the thought came to make it worldwide. So once every 3/4 months in a specific days people organise themselves in the forums of sketchcrawl and they get together to draw in one day.
And Mauritania started it this Saturday just five of us but we hope to be more next time.