MM #6: Throw a Theme Party (900 pts)

It doesn't have to be at my house, I just have to be a main person in charge of getting things gathered, getting people there, and so on. Themes, for example, might be a Luau, Pimps and Hos, Toga, etc. Bonus 100 points if over half the people in attendance are dressed according to the theme. Min. Requirement of 15 people.