Harry Potter and the Goblet of Fire - Chapter Twenty-Three: The Yule Ball
Once everyone else was settled in the Hall, Professor McGonagalltold the champions and their partners to get in line in pairs andto follow her. They did so, and everyone in the Great Hall applaudedas they entered and started walking up toward a largeround table at the top of the Hall, where the judges were sitting.
The walls of the Hall had all been covered in sparkling silver frost, with hundreds of garlands of mistletoe and ivy crossing the starry black ceiling. The House tables had vanished; instead, there were about a hundred smaller, lantern-lit ones, each seating about a dozen people.