The biggest tip I have - read the room. I'm not someone who is attracted to a man's appearance. Like it's not a thing for me.
I BECOME attracted based on intelligence usually discovered through long talks.
But I also never give encouragement in a public setting for that reason. Because I don't want to be approached. I think it's obvious when a woman is okay being approached. She makes eye contact. She appears open. She's not wearing headphones and ignoring you.
The men who approached you weren't respectful. Which is a lesson for men in general. If you can't be a decent human then approaching an unknown woman is never going to go well.
This article was more for the men who are decent humans. I'm assuming there are some.