Hey bro, wen u are at a party. Just use social opener and then after some playful talk say some thing like
" i have some intuition abt u missy " as u say it just grab her hands. As long u are smiling and keeping eyecontact with her and not giving any value to u touching her it should be fine. And then continue to say what u have to say.
And i dont think u should start by saying u are insecure. When using these it is best to start with something more positive.
I personally use handshake and palmreading. And i just say bullshit
Anyway gd luck bro x