I'm fine with him going alone during the week since I know a lot of people (including me) like to go get a drink sometimes after a long day of work. But the vibe is different during the weekend and he's not a sports guy so I know he's not there to watch a game lol
Am I being unreasonable? I just don't understand why someone who's taken would want to go to the bars alone on a weekend, it's not relaxing at all, at least for me.