We had a group of nine on a girls' cruise last year! Got the idea from another thread on here (I believe someone's trip report...). I made a chart with different spots where you can buy a drink. Got some of those scratch-off stickers from
Amazon and put them over each location, so you had to scratch it off when you'd had a drink at that location.
Man, that was a fun weekend.

I'll be happy to share the card I made for it, if you have Publisher!
Edit: So sorry, didn't give a lot of details, haha. If I remember correctly (again, fun weekend

) we took the whole weekend/cruise to do it. That's a lot to do in one day. I didn't specify drinks, only because with nine women everyone has different likes and dislikes... and coordinating schedules and carpools for this thing was difficult enough, I was not about to petition for poison preference. Only one we skipped:
Castaway Cay. It was pretty much a given we were going to have a frozen drink in our hands, no one wanted to deal with a piece of paper or a card as well.
@suedon70 was going to get a prize for the winner, but she was the winner so I believe she just bought herself a souvenir. Haha!
Have fun!!