According to the French Law:
Running = sport = no masks needed Walking = walking = masks needed Standing = walking at 0 km/h = masks needed Standing + eating/ drinking = restaurant = no masks needed Smoking = eating cigarettes = no masks needed Sitting on a bench = FORBIDDEN, just forbidden Sitting on the ground + begging for money = essential work = no masks needed
https://www.youtube.com/watch?v=7t4JIEC_gk0