If my memory serves me correctly it starts at 6pm right outside the lobby doors . . .(I'm going back now to 2000, so things might of changed)
When we stayed at the Poly we were greeted by a woman who was singing, etc and had us all come outside . . .then a man did a small fire dance with botons and ran around lighting the gas torches.
It was pretty entertaining . . .it lasted around 10 minutes or so.