Having a photo-booth is good entertainment, and a great way to get funny pictures of all the people at your party. I find that guests tend to tire of having their photograph taken 2 or 3 times in the day but taking your own picture is a completely different experience altogether.
I set up a camera which points to a black background and then I invite guests to take pictures of themselves, using a shutter release cable. Although this is very simple to operate I will stay with this camera all night to encourage all your guests to take part and as you can see the results are very amusing.