Before the hen party gets into full swing, take 3 or 4 of the groom’s male friends. Ask them 20 questions about the groom. At the hen party, have everyone test the bride as to how much she knows about her groom. Let the guests write down how many of the twenty questions they think she will get right.
You can even take bets! After all, this is a hen party game. Get a buck from each guest and the winner will get 1/2 of the money. The other half can be spent buying drinks for the hen!