actually there are two main reactions from girls who realize you are using "game" to well, improve your game.
If they are defensive types (usually uglier, perhaps have had issues with men or even been abused), they get pissed off. They will call you a manipulative bastard and all kinds of crap. Who cares, these girls are generally a pain in the ass to be around with anyhow. They are typically the ones who will cockblock you when you hit on their friends. You can educate them, but I dont unless they are really nice under that layer, or hot.
If they are outgoing types (usually hotties or at least have great personalities and arent afraid of life) they will be totally attracted to you for it.
These girls think its great that you are taking the time to improve your skills with women, and moreso that you selected them as potential targets of attraction. That makes them feel hot, and puts you in the light of "different from ordinary guys, somebody who actually cares about what she thinks/feels/etc."
Now, as for your story, I think you got burned in the end because you kind of went after all of them instead of picking just one. You have to show them that you are a selective man. Otherwise it comes off as desperate or just "Meh, I dont care as long as I get laid." Sounds to me like the brunette kinda liked you the most, but her gf's almost certainly talked her out of it and then they all went out together, without you.