I know that I'm not there and all, but I just went to see Calendar Girls, and it was a PHENOMENAL movie.
I strongly feel that going as a group to see this movie is a must do for a sisterhood event. It was hilarious and poignant and (I'm sorry to use this word) empowering. It's a beautiful look at life, womanhood, and the bond of friendship between women. That probably sounds more on the cheesy side for me, I know, but I wish that this movie I had gone to see with some of my female friends instead of with my husband. (Not that I did not enjoy seeing it with him, and he loved it too.)
This is just the kind of movie sisters should bond over!
So, that's my idea.