This forum has a very low tolerance for jargon and nonsense, plus we like to rib people.
The upside is the advice you'll get is very sound and from experience. Plus it's from people who know what they're talking about and aren't out for your money.
(astroboys apps mint though, full 1997 geocities vibe)
What I'd say add is to bear in mind that numbers aren't shit. Girls will give their numbers out pretty easily, sometimes just to be polite, so if they aren't particularly into you and you haven't really taken the time to properly hang out with them them want be stoked to hang out. If you get numbers from brief interactions on nights out they often won't even remember you.
This is where the whole
PUA ideas of a number being a 'close' or having a 'funnel' falls apart. It implies you should be having tons of short interactions just to pick up numbers. As if the ideal is to do 20 5 minute interactions instead of one or two ones for a much longer time. Remember, regardless of how you do it, your actual goal here is to spend time with girls, so dont defer by just grabbing her number and leaving. Stick with it, try to hang out with them. A girl won't remember some random dude who spoke to her in a bar for 5 mins, but she'll remember someone she hung out with all night.
So where are you doing these, and how long do they typically last?