Hassan Hajjaj's best photograph: Kesh Angels, girl biker gang of Morocco

'They worked among the snake-charmers and belly-dancers of Marrakech. I christened them Kesh Angels and gave them heart-shaped sunglasses'

When I first met Karima, she was 14 years old and selling bracelets in Djemaa el-Fna, the bustling central square in Marrakech. She's the girl on the very right here, leaning to the side. They're all henna girls now, Karima and her friends, and they posed for this in 2010, in front of the Theatre Royal in Marrakech.

Djemaa el-Fna, which means "internal space", is where all the snake-charmers, storytellers and belly-dancers work, in among food stalls and other types of entertainment. The square's been there for centuries. It's like a vast piece of street theatre, full of people all day long - tourists and Moroccans alike, there to buy food, have henna done on their hands, or just become part of the big play.