I don't believe in this "game" nonsense, where there is some sort of combination of words and steps you are supposed to take to guarantee success. In an environment like this, I think it comes down to her finding you reasonably attractive and from there just being able to hold a conversation and not being a weirdo.
One interaction I remember from years ago that I witnessed was a man who approached this woman at the gym, he didn't even ask for her name and barely tried to get to know her but yet asked for her number. I give him credit for trying, but most women are not going to be receptive to that, as it comes across as far too eager like you are just going for a booty call. Again, very few women are actually into that despite what some on here feel.