I just wanted to touch base a little and offer some insight without actually knowing the full story.
I think that it is a good thing that your wife is getting out and getting a new hobby. She's found something she enjoys and if it is one night a week it sounds as thought it's a hobby in moderation.
So, she might like pool... what's your thing? What do you do where you get to stay out until 3am or whatever? Maybe yours could even include weekend trips or a group that meets regularly.
I don't want you to get sucked into the "everything she can do you, you can do better" mode of thinking, it's toxic. Think outside the box, though. Explore your own interests.
You don't have to play pool to have quality time with her. And Thursday won't be the best day to initiate the one on one. She may feel crowded and threatened if you chase her in her exploratory interests, and that won't do anything but cause a bigger rift. So---
Is there something that you enjoyed doing in the past? A movie she might want to watch?
Again, you may be doing this already, I'm not familiar with your situation.
"It is not easy to find happiness in ourselves, and it is not possible to find it elsewhere."
--Agnes Repplier, writer and historian