I was thinking about how things that you done as a kid seem to work for flirting, y'no pokes in the ribs, tickling etc. and this led to me wondering about opening with such things. I have been opening a lot of girls recently with thumb wars, or slapsys or arm wrestles, thumb wars are my personal favourite. It makes for a remarkably simple open. You simply walk up, sit down and offer your hand, they will normally take it, then start your thumb war.
It's easy enough to transition after to whatever you would normally dhv with and it completely destroys awkwardness and can be quite fun if it gets competitive. I also guarantee they won't forget you any time soon I use it quite a lot when winging the cock block you don't really want to close, because it's quite engaging she will forget about what her friend and your wing are up to
If you decide to use it let me know how it goes, and have fun