Not sure what other people think of this, but I consider it to be the most important part of my PU game now.

Situation: You're in the smoking area of a club and you spot a 8/10 Brunette with two female friends.

You could go over, open the set with 'Is kissing cheating?' and take your chances... Or, you could open an adjacent set, demonstrate your value to this set, run the Cube on them, do the Pen 15 club or the mice race etc. Then, when you've built rapport with the girls (I normally wait until I think I can at least get a phone number then get the phone number in front of the other girls a few minutes later), take them over to the set you really want to open. Tell them you're having a debate with the girls you're with and you wanted some other opinions (this is also very good as the girls you bring over will start chatting to the new set and you can use that as an excuse to disarm her friends whilst you DHV the target.

I truly believe that this is how you run perfect game.

P.S. As I was saying to somebody in the chat room earlier, this also acts as a way of making new hot female friends who you can take with you to places to increase your value. For instance, you've agreed to go to a bar to meet some friends. You could turn up alone and just have a good time with them right? Or you could turn up with two beautiful women who you're joking and laughing with as soon as you enter the place, and now everyone in the bar is looking at you, because you're the man!