The only one I know is when the MOH or one of the bridesmaids tell the story of how the bride and groom met and they have to pass a item to the right or left and at the end of the story whoever has the item wins something.
the clothespin game is fun - each person gets 3 clothespins. you are not allowed to do certain things - for example at the shower i was at we couldnt cross our legs, touch our hair or say the grooms name. If somoene caught you doing one of them - you could take their clothespin. The person at the end with the most wins a prize