This. And don't bother with this girl.
Or after a month of passing polite greetings at the door on a day she looks hot, tell her in a playful way, "Damn [insert name here], you look good today. Is it still your policy not to give out your number to gym guys? Because you are the hottest girl I see, day after day. You need to help me out and let me take you our and treat you like a princess."
She'll probably laugh at your ass and say no, which is the 75% response I've often gotten to such crap. But it plays on woman's most basic carnal desire -- to be lusted after. This is such a basic desire that 1/8 woman have rape fantasies. They want to be so beautiful and hot that men lose control around them.
As a result, about 1/4 say "yes," especially when you do it where they won't be slut-shamed or talked about --- e.g., on vacation, at a business hotel, whatever.
Odds are less at her place of employment because the price of poker is too high.
But at parties, whatever, the direct, you-are-hottest-girl-and-I-want-to-fuck is amazingly high percentage.
Witness an approach that I used to do and it was not thought out, but what I really wanted to know:
You see hot girl. Walk up.
You -- Hi my names Dave. What's your name.
Her --- fuck you, go away, unavailable, or "Glenda"
You --- leave or "Glenda, you are the prettiest girl here and I want to know if your personality matches."
Engage in further conversation, I seldom made out with girls in public, as that often ended up with an ex throwing a drink on me, so I'd typically lead into "We should go somewhere to get to know each other better."
Either a no, or sex.
Just be direct. All the white knight bullshit is bullshit.
I met my wife skiing (or more accurately fucking with my ski boots as I walked up stairs and clogging traffic). She was wearing skin tight ski pants. She said "what are you doing down there" (because I was clogging traffic). I responded, "looking at your ass, it's absolutely fantastic. My name's Dave." And I walked up and shook her hand.