Poker Night/Dare Poker
Bring the casino to you with an at-home poker kit. If you aren't familiar with the game, this article does a great job of explaining it all.
What you decide to bet with is entirely up to you. However, to remind everyone that this is, in fact, a Hen party, you could play Dare Poker instead.
Each person writes down 10 different dares on slips of paper. Instead of playing with chips, you play with dares. You read out your dare before adding it to the pile in the centre of the table. There is still a “blind” slip that goes around the group, So, there is always at least one dare on the table. At the end of each round, the last person standing gets to collect the dares on the table and enforce them as they see fit. So be careful! Writing a particularly gross dare might be funny until the winner decides to give it back to you to do. Once those dares have been done, discard them and start a new round. If no one wins that round because everyone folded, then all the dares stay on the table. Keep track of the winners of each round until all the dares are gone. The person who won the most rounds wins the game! If someone outright refuses to do a dare then they must do a shot instead.