My date routine.

1) when I meet her I give her a half hug i.e I will hug her where my right hip should touch her belly button except that its a ass-out hug.
2) gauge how the conversation is going. If its going good I will give her a slow hi-fi on a high note and then interlace my hands with her to test her responsiveness.
3) if she feels the same way she will interlace her fingers and thats my confirmation.
4)Once its confirmed then I put out my hand and walk with her promenade style to the dance floor.

At this point both of you know that you're into each other.