It's Beer Battleship! Play the same as regular Battleship, but when you're ship gets hit, you drink. To really get things moving, fill all the ships with shots and all the free spaces with beer (a little mind you) and drink on every turn.
I pinned this for you because I remember you saying you wanted your bridesmaids to have whatever style they wanted but the same color. This is also a cute idea but they pick a dress in the wedding color scheme.