17th Birthday Party Ideas?

I'm turning 17, on the 15th of December in the summer, and I don't know what to do. There have been 2 parties already this month and 2 more to come within my friend group (of 12 girls and 2 boys) and I would like most of them to come to some sort of gathering. They are expecting my tradition of going to the Chocolate Lounge then a movie, usually the latest Hobbit movie, but with a 45 minute battle scene in the next movie and no other movies, and way more people than last year, I do not want to do that.

(The parties being thrown by my friends have been: going out to dinner, then a sleepover and a Disney heroine themed sleepover) I want something fun, and maybe cheap, like a party at my house or go out somewhere.

By LillyJay