Yeah, I am going to agree that magic pick up lines won't work the majority of the time.
Although I do use some script when I do a certain trick, it may be French Kiss I don't know the name, they sign their card and put it in their mouth and I do the same and they switch.
I go with the trick and when I sign mine I start to say " Girls love this one because it doesn't require sleight of hand but sleight of mouth." Take a quick pause then insert in mouth and do w/e. I pull it back out " Sorry bout that, used to much tongue." I get some laughs and they all know it's in good fun.
Other than that I never use the "put your phone number underneath" it's to lame to me. Any pick up lines should be small jokes in good fun and see how they react to everything, if they seem to be enjoying you and not just the magic then time to make a move.