A friend of mine from work is having a dinner party this weekend. It's a "no boys allowed" dinner party. Which, for most people, means they can't bring their significant other.
Part of the reason that girls want the girls night is just that the dynamic of the group is different when it's just one sex. The conversation can be very different. But, on the other hand, part of the reason that girls have the girls' night out is that the dynamic of the group is different when no one's other half is there. It's hard for me to complain about my relationship when she's sitting right next to me.
So, when it comes to the girls' night out, we are always stuck in the middle. On the one hand, we are, in fact, both girls. But on the other hand, we are, in fact, in a relationship. So whenever girls' night out comes up (or girls' night in, in the case of a dinner party) we always have to sit down and try to figure out which kind of girls' night out it actually is. This involves a complicated, multi-factor test.

