This is a great Hen night game - you will love it!
What you need is a bag of balloons, a chair, a pen and paper. Not forgetting some friends.
Next, you come up with funny things for people to do and then write on little bits of paper a message for example: 'You have to sing and dance to an Elvis song'. Then you put the message in a balloon, then you line people up and they pick a balloon, then they put the balloon on the chair and pop the balloon with their bums. What ever is on the message they have to do.