The Gimmick
4. The GimmickTo stand out from the dozen other rooftop parties going on, you need to think of a simple gimmick that will get people texting and tweeting about your summer bash. Cost effective and fun ideas can range from supplying your guests with silly string, glow in the dark sticks, and sparklers to disposable cameras placed randomly around the roof to help your guests party like it's 1995. [Photo via]