My last 2-set:
I go up to them, stop them with a hand gesture while saying "I am sorry, I have to shortly interrupt you." My target looks at me, I immediately say: "Yes, you". Pause. "I find you very attractive". Both smile and it hit my target the way it should. She: "Thank you". Me: "Hi, I am Otis". She: "Target, hi". Me:

"You are so...I don't know...surprised, stressed..."
She: "Stressed, because I have to go"
Me: "Stressed, that's a pity" saying in a cocky tone
She: " to the gym."
Me: looking up and down at her "I would have never guessed it".
Me: "Listen, I'd like to continue this with you" I see her look at her friend "I am convinced, your friend likes me too".
She: "Umm, I don't think she does....but I am taken, I am sorry."
Me: "Oh, that's a pity, have fun" and I leave, looking for another target.

Now that was winging it unsuccessfully in the outcome.

I wonder how I can follow up better and what I could have done differently in this very interaction.

PS: I happened to see them later, my target looked at me with disgust.