The way you meet a girl can have such an effect on how she treats your future encounters / communications.
It is literally the difference between a girl replying to your texts/calls immediately, wanting to go out with you, and actively trying to get to know you vs. a girl acting "busy", flaking on dates and just talking to you when shes bored.
The best way to meet a girl that you dont know is to do so in a
coincidental matter; never force it. If you have to do the whole walk over and introduce myself thing it will probably result in a wrong number ...but if it is or you can make it seem like it was by chance or fate that yall met eachother then things flow much more naturally. It also helps to meet girls in a more communal or low energy atmosphere such as a function, through a friend, classroom, library, waiting for the bus or when youre doing a hobby etc.
In the club however, if you aint taking the girl home that night dont bother. The whole reason youre in the club is to mack on girls for the most part and girls will always have their guard up because they know the game. Not to mention the obstacles such as other men gassing her up, her feeling herself cause she's all dolled up, loud music drowning out your game, friends telling the girl youre macking on that they need to go to the washroom, girls dancing in groups of 4, fat friends hating etc.

. It can also be harder to build a rapport that you can use as leverage into a real conversation later because the conversation isnt natural and theres not much to talk about in such a setting. This is why after a certain age most men stop the cold call approach trying to get random girls numbers. Its too much of a numbers game and its inefficient. As a batter you dont swing at every pitch. If its in the strike zone or where youre hot (in your element) by all means. But once youre swinging for curve balls into the dirt you have to check yourself.
Instead you treat a girl like you dont even see her when shes all glammed up and then if you happen to see her around the hood, campus or whatever when shes in sweatpants, hair in a bun and all that you go for the kill. In her mind, youre not just some shallow guy looking for p*ssy. You're not some creep who was plotting on her, thinking of the perfect thing to say. Instead, youre simply exchanging numbers because it was the
natural thing to do after conversing for a bit in a common setting.