I've been dating women in their 20s for about a year now, after a self imposed exile. They ALL claim to have some kind of BF... It's strange, maybe it's a generational thing I don't know, but I think they do this because they KNOW there really isn't any kind of future with an older guy and they say this sort of thing to let you know that if ANYTHING happens it's your fault, and it will NOT be permanent.
I always just ignore this and keep trying to make dates. When you see her and she gives you high IOI, or if she reaches out to you try to make a date. If she won't go out with you, then just move on. One of two things will happen, she'll drift away, or she'll come after you hard. If you know she wants you and mentioned her BF then just say, "Hey, I don't care about him, what you do when you're not with me is your business."
Never dated a stripper.... but I had a room mate when I was in the Army that had strippers in and out of the apartment all the time. Never looked like anything serious, as long as you're just having fun I see nothing wrong with this.