I made up this opener that will for sure give you a good conversation if you approach the right way. It might go something like this if it is used well.
Opener: "Excuse me, my friends think this shirt looks bad on me and i wanted to know what you think about it"
She'll either say it looks good or bad.
Then you can talk about the fashion styles and use a neg to be flirty.
Girls love to talk about fashion and it'll make it enjoyable for them and it will build rapport quickly.
For this opener,energy is key because then she'll more likely want to talk about fashion.
Thanks for your feedback guys.