It's such a nice change of pace from the parks. And don't worry about how you dress. I came straight from MK during a downpour - complete with baseball hat, wet and squeaky sneakers, and an umbrella. My friend met up with me from Animal Kingdom with her poncho and the same wet sneakers!! Some people were dressed a bit more, but most were in their normal hot weather clothes.
I ordered the Buckingham Palace, she got the similar one that comes with the champagne. It was great fun and we actually were kind of stuffed from the cute little finger foods. The most annoying thing was trying to decide on which pastries since they all looked soooo
!!! Have a great time!!