Asking his wife about Saturday night is neither childlike or subservient. It's common courtesy. Weekends are the only free time busy, working people have together. If you don't think it's important to at least coordinate that time with your spouse, you don't have much of a marriage. Heck... You should have invited the wife too. I'd rarely accept social invitations that wouldn't include my husband, and I don't think he would either. Not because we aren't allowed, but because we wouldn't want to. Marriages need recreational free time. It's not all about the kids, the bills, the house, the projects... oh - and "why don't you ever want to have sex any more"?
Maybe that last comment was a bit TMI.
Sorry about that nonetheless.
But you are wrong.
No wives get invited to poker games.
He wanted to go.
He asked permission if he could go just like he does everything else.
He wanted to go. Understand that? He wanted to go. She said NO.