I frequently look for party tips that are unconventional and out of the box. I found that Youtube is normally a great resource for this kind of ideas. All you will have to do is check out Youtube and do a search for "party ideas" and you are going to find many hours worth of videos with a large number of fabulous ideas. The trouble is, who has time to see them all? So I am on a regular mission to put together some notes in order to save me and also hopefully others some time.
Here is an awesome video with some crazy party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
Hope you find a few good ideas for your future gathering on Youtube!