Men go for different reasons. Men aren't clones who all do the same thing for the same reasons. Some men go to see the women. Others go just to hang out with the guys. Some go because they might have a friend that works there, or because it is a close place to get a beer, or any other number of reasons.
Now, that being said, I should point out that not all men go. Also, some women go. So we're not talking about something that is just a "guy thing."
If you want to know exactly why your husband goes, you'll just have to talk to him about it. There are at least a dozen reasons why someone might go, so we won't be able to tell you exactly why he does. If you're ok with his going there, but think he might be doing a lot more than looking once the place closes, say so.
You should be able to communicate and be happy in your relationship. If you feel like you can't trust him after the place closes, that's something that will have to be looked into. If there is no trust, something might be wrong in the relationship. Maybe couples counseling would help you two if you can't sort it out on your own.