While wandering around among the backstreets of the Souq al-Hamadiyya, Jeremy and I stumbled upon this gathering. It was great fun to watch - everyone seemed to be having a great time, even as they blocked traffic along the small alleyway, both pedestrian and vehicular. It looked like the groom's wedding party from a distance, but as we grew closer, we could tell that it wasn't quite the same. A bystander confirmed that it was not, in fact, a wedding dance, but he couldn't tell us exactly what it was, either. Upon closer inspection, we could see that it wasn't a groom in the center of the circle, but a water salesman.
So I'm still not sure of the occasion for celebration. Whatever it may have been, it sure was a lot of fun for everyone involved, including us onlookers.