Not more than 5 (not too long before the mall closed- I can't remember exactly when it was, but I'm going by how old my daughter would have been). There was some event held there that she attended. I was actually surprised they allowed it to be used as it was in a part of the mall you'd never otherwise access, and would normally have had the entrance blocked. I wandered around a bit, and the flooring leading to the area near an outside stairwell had missing sections and gaps in it which looked very dangerous (though this area was sectioned off and blocked by a gate). It looked like the refrigeration equipment for the ice rink was still in place, and even the old concession stand was still there.
I was struck by how the large, high-ceilinged space was essentially going unused (I didn't get the feeling many events were held there)- it seemed like such a waste.