I'd recommend not making a plan like this. Plans like this only serve to get you overly outcome attached and stuck in your head. In practice this generally causes people to shoot themselves in the foot and do more harm than good, especially in a case like this. In short, it's a recipe for ending up crying in the shower listening to enya.
DHVing and trying to micromanage social proof are also bad calls. In general any attempt to impress people, no matter how subtle or convoluted, is just an implicit way of saying 'I NEED to impress you because I view myself as being of lower value'. People can pick up on this. High value people are secure enough to not feel the need to 'demonstrate' anything in order to be accepted.
Speaking from personal experience I'd recommend leaving it. She might get back with you eventually, she might not. Chasing her and hatching plans to get her back just makes it more likely that it won't.
So if you want a plan for that night, here it is. Go out with your mates and have FUN. When you see her be nice or whatever, don't ignore her and act all butthurt, but also don't feel the need to cling around. In other words, don't TRY and do anything, chat to her and her mates, chat to other girls and have a good night. That's all you need to do. Then go out and meet some other girls on another night. If she wants you back cool. If not then there's plenty more biznitches in the sea.
SWINGERS EXPLAINS ALL
http://www.youtube.com/watch?v=tu-QjTNtDz8&feature=fvsr