I came up with this opener when reading a post in this forum with a more direct opener but this is my version.
So you go up to some girl with a piece of paper and smiling

Me: Hey, can i borrow a pen? i'll be quick and... i promise i won't steal it (always in a fun mood)
HB: Sure/ Yes (hands over pen)
Me: Thanks. So... what's your number? (then smile and say something to push her)
ah ah (you wish/just kidding)! but seriously i need to write the grocery list (or just say something like this( signing something, cheating in a test... use your imaginationxD)

then quickly start writing something from your cellphone to the paper like you asked the pen for something you really needed xD

after that just keep talking to her while you are writing, she will stay there because your using her pen, start talking about what you are writing then change it to any other topic.
I just came up with this, need to field test it, but it looks good to me.
I would like to change this to a nightgame opener, because i think it would be great.

If you have any ideias for improving this to nightgame, or any advice or feedback say, please