I often seek out event approaches that are unusual and out of the box. I found that Youtube is certainly a wonderful source of this kind of tips. All you will have to do is go to Youtube and do a search for "event suggestions" and you are going to find hours and hours worth of video recordings with numerous good tips. The trouble is, who exactly has the time to view them all? So I am on a constant quest to collect some notes to save me and hopefully other people some time.
Here is a great video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you find a number of great ideas for your next occasion on Youtube!