tldr; Girls Night Out for your married 40 something wife and mother of your children is not the chill, have a glass of wine and talk to her friends and relax event she claims it to be.

Body The wifey has been on a couple of GNO over our relationship. A few years ago a neighbor had organized a couple of GNOs. My wife went on 2 of them. I really didn't think much of it. They were to see bands and go dancing. After the second one, she invited the husbands claiming that she was getting shit from "people". Only her husband and myself went from the husband crowd and it was, from what my wife told me, far fewer women. One of the women, married kids etc., was acting in a way that was completely inappropriate towards the other men at the bar. And after a while, inappropriate with one in particular. Not sure if word got round etc. but there have been no other GNOs from this woman.

Fast forward to recently, my wife went on a low key GNO to a local place organized by someone else in our town. Totally different crowd. I'll admit I don't really know it was low key but from the details I got that is what it sounded like. Last night was the second one organized by this woman. My wife told me about it last night but said she wasn't going because she didn't really feel like hanging around most of the women invited. Kind of bland people etc. Anyway, my wife goes to bed and I come to bed a little while later. She is asleep and her phone is buzzing on her night stand. I go over and see what it is and she is getting what appears to be a group text from all the moms invited. I pick it up and flip through. They are at a sports bar and it's around 11:30 at night. There are pics of the women definitely engaged with a group of 20 to 30 something year old men. There is touching in the pictures etc.

Now there is no way to know of what went on or what was going on or what happened later. But clearly if one of the husbands walked in and saw what I saw in the pics he would be taken back.

Summary GNO is not, from these completely separate two experiences I've seen, an innocent night where ladies get together and have fun with each other. It is clearly a time for ladies to get away from their families and behave like they were single. Simply seems to be a way to get tingles out of the sight of their husbands.

So, how do you guys handle the GNO? I am kind of wondering about this right now.

edit: UPDATE

So, I got home from work and told my wife that I noticed her phone buzzing and looked at it. She replied with "Holy shit, did you see that. I am so glad I didn't go." Apparently, this was billed as a low key dinner event at a restaurant not a bar. However, after dinner some of the ladies went to a sports bar. So, the group messaging was between the ladies that went home after dinner and the ones that continued on into the night. And apparently, the invited that didn't attend.