Normal is what’s normal for you. If you’re wondering how often a married man should be going out to bars with his single friends, then ask yourself how often you’re comfortable with your married husband doing it. That’s the answer.

I’m (37M) and have been with my wife (36F) altogether now for about 13 years. We’ve gone out solo with our friends - single or otherwise - here or there over the course of the relationship. We’ve always been comfortable having it be a once or twice a month kind of thing. Talk to your husband. I wouldn’t overthink the fact that he’s inviting you. You’re still young. I loved hitting the bars with my now wife when we were that age… and now too! I think there’s compromise here if there’s calm communication.