Okay what I wanna try out:
Me: "Hey, got a question for you... *slight pause* did you ever do a professional photoshoot?"
Now there are 2 possibilities, yes and no. If yes, just ask how it went, if she liked it. Tell her I got a studio and I'd like her to check out my work and contact me if she likes it. Hand over business card.
If she never modeled before:
"Okay, well I'd like you to check out some of my work as a photographer. And if you like it, perhaps you can contact me so we could work together, if you like"
It's very very straightforward, give the person enough space to never react... but hey it might actually work if she wants it. If she doesn't want it that much, I don't want her in my studio anyway.
What do you guys think? Any suggestions are véry welcome!