Realy? Are you serious?! The whole "look this is the Beasts castle and his bestial lover who can't pay the bill so they converted it into a restaurant" doesn't make sense to me.
If they do they Great Dining Hall it needs to be like the movie and/or the books. Not a cheap theme park-ified version.
Well it certainly wouldn't have the faux castle on top...I would suggest floo poweder to transport us into Hogwarts...Or maybe we have to pass through the Chamber of Secrets underground to get "into" the Great Hall...
I think there are some liberties that they can take with the tables....At the end of the day I would say everything is going to be theme park-ified to some extent (safety signs, cast members pushing trash cans through, reservation and waiting table outside, etc)...Sometimes you just have to suspend your disbelief