I often seek out party ideas which are out of the ordinary and out of the box. I find that Youtube is usually a good source for these kinds of ideas. All you need to do is browse Youtube and do a search for "event suggestions" and you can find hours worth of videos clips with many awesome suggestions. The problem is, who has enough time to watch them all? So I am on a constant quest to gather some notes to save me and also hopefully others some time.
Here is an awesome video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
I hope you see several great ideas for your upcoming celebration on Youtube!