If I have a wife/girlfriend, it's a no-no. Another no-no is doing it with a married woman. Still another no-no is doing it with a minor. Same goes for any woman I'm even remotely related to. Any other woman outside of those is fair game.
If I was single and unattached, no problem. In fact, I frequented a lot of strip bars when I was single.
In short, hussies and sluts were just fine with me when I was single.