13th Birthday Ideas

My 13th birthday is comming up soon ( yess fianlly a teen!) I want a party that is unique and like no other... But i dont have a huge budget to spend on it. So ive been doing research on it and im going to have a 70`s themed dance. I`m goign to hire a D.J. To play most of todays hit music but also do a few of the 70`s swings. I am inviting boys as well as girls of course and i think it will be alot of fun.. I`m worried thoguh of the same problem one of you had and that is too much dirty dancing. Sure the boys and girls will dance.. And not all that approapiate but some do get out of control.. Any idea on how to stop it but not embarass my myself doing it? Reply back on what you think of my theme and how to keep the dirty danceing from occuring.