I normally hunt for event ideas which are unique and out of the box. I think that Youtube is certainly a great resource for such tips. All you will have to do is go to Youtube and do a search for "party suggestions" and you can find hours worth of clips with many wonderful tips. The problem is, who exactly has the amount of time to see them all? Thus I am on a regular quest to put together some details in order to save me and hopefully others some time.
Here is an awesome video with some crazy party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you find several good ideas for your future gathering on Youtube!