The Answer is "You don't." If you seperate a two set without someone there keep her entertained it's not going to work. The obstacle is going to be worried about her friend with some guy. Your target is going to be worried about her being alone. It just doesn't work out!
If you have a wing then you have someone to keep the obstacle busy. You also have the option of merging some sets and so that the obstacle has some new friends to talk to before you isolate.
In the case you can't do this, then you are going to have to move the two set together. If you want to go with them down then go sit them down together. Everywhere and everything you do you need to take them together. You need the obstacle to like you. You need the target to like you just a little bit more. Keep them together to preserve comfort levels! Also, when they are driving home together they are going to talk about how great you where instead of, "Why did you abandon your friend? Where did you go off to with that guy?"
So let's say you move them together and you sit them down on the couch. A lot of people would think to sit in the middle of them. Now in a louder environment like a night club if you talk to one the other can't here what's being said and feels left out which isn't cool so this is how you should sit.
You - Target (middle) - Obstacle. This way you can talk over your target to the obstacle and leave her out a bit but everyone can hear what's being said and no one is being left out. You can still play the same games in comfort and all but now you do it for them both. You keep them together and you will get better results.
Trust me I've done this many times in field, and even created 3 somes this way. It works!
