Ya, I have read some examples of blue pill behavior when posted to main sub, but I mean in a real situation, how would a beta act?

Let's say Beta is meeting the girl first time and it seems obvious the girl likes Beta and he knows this (whatever lucky guess he had, he notices a tell and its true). How would a beta go about this?

Let's say the same but at a party with people around.

I want to at least understand the beta ideology, thanks.