Have you ever been to a themed party where you dressed up accordingly?

Every year we have a themed party which includes costumes, food, music, backdrops to match.
Over the years we've had the following themes: China, Under the Sea, Colours, Out of Space, Countries, Black & White, Hawaii, History, Fairy Tales... Can't think of anymore.

Anyway they are real fun, seeing what everyone dressed up as and how they interpredted the theme idea.