I just walked in the door and hope to catch you before you leave (if you are going).
There should not be any talk of drinking at any meeting. The purpose of the meeting is to discuss recovery, not war stories. If you are at a meeting that they are talking about drinking then you are in a bad place. And, at the beginning of the meeting, the chair person should request that anyone who has had a drink that day---not speak but listen instead. So you should not see anyone who has used that day speaking. It will make it that much more comfortable, hopefully. The purpose of a woman's meeting, or a men's meeting too is to discuss personal issues if necessary and appropriate. In the fellowship a suggestion is made of "men with the men and women with the women" so having a meeting closed to the opposite sex is from that suggestion.
I hoped this helped a bit and I hope if you are attending this evening that you enjoy it. Take what you need and leave the rest. Let us know how it goes.
I think its because when you look to the same sex for support, there is less chance of distracting things getting in the way of getting clean. Less chance of romantic feelings starting up...