what i tend to do (mainly in a club or dancefloor or something), i just grab her hand or fingers, and twirl her round in a fun playful way, and hold onto her hand a little afterwards, let go, or hold her hand for a bit if it seems right.
and/ or if a photo is being taken of us, put one arm fully around her, maybe tickle her in her side to put her off the picture....then slide hand back round towards you, and let your hand just rest on the side of her thigh, sometimes leads to hand holding if attraction is there
but otherwise just make sure you gently take her hand when you introduce yourself or touch heron the shoulder when you initially start speaking to her
hope this helps
