The Warner Brothers Studio Tour London held a Christmas dinner for serious Harry Potter fans right there on the movie set. Redditor DestinyBlues went, and had a magical time.
Dinner was served in the Great Hall at Hogwarts, which was followed by a ride on the Hogwarts Express. The participants also took the studio tour and saw the mini-sets, and the evening was concluded with a dance. Lots of people went in their Harry Potter cosplay Sunday best. See 37 pictures of the event at imgur. A good time was had by all. -via reddit