Have you thought about doing a photo booth at your wedding? It's a great way to get people up and mingling during the reception and is a great alternative to give your guests who don't want to dance for hours on end.
If you're planning on doing a photo booth at your wedding, think about the style of your wedding, how can you incorporate that into the booth? Perhaps you want to incorporate something else that you love into the booth. Do you love the mountains? How about a ski themed photo booth? Another of my favorite photo booths had a backdrop made out of the couple's record collection.