In most cases, if you come across Girl B, I recommend pushing for the hang out immediately.
You must first ask yourself if you’ve met the girl before.
If yes, did you meet her at a party, through cold approach, or have you been friends for awhile?
She will feel less cool than you, which is ultimately what you should be aiming for. Tell her you think you met her at the party last night. End the conversation and text her something random the next day.
But, she’s most likely going to answer with, “Who is this”. She’ll be very curious and will probably start asking for a picture of you or your Snapchat/Instagram. After you’ve talked for a little bit, then you can push for the meet up if she hasn’t already. Getting a girl’s number through cold/warm approach is a little bit different than through a party because the girl knows you’re at least somewhat interested in her.
I will explain the reasoning behind this in the next section. After you’ve determined your relationship with the girl, you now have to see what type of girl she is. Girl A is obviously the kind of girl you want to be dealing with. It’s almost amazing how different/worse a girl is if she has an i Phone versus any other phone.