Maybe I used these or maybe not :

Wanna fuck ?

This works best on true blonds. Must be delivered with an absolutely straight face and of course there is no real substance on the napkin.  It' all about the "Gotcha Moment " when she actually starts to lean in to check I've actually tried this at a few M&Gs over the years and after a few drinks you'd be surprised how many fall for this joke.

Her approaching strange man in bar: Would you like to play a game with me?
Him: Sure!
Her:  It's called "just the tip."

And I'm sure much more attractive to the opposite sex. I was in a club and met an older lady ( I think we call them milfs  or cougars now) as I approached the bar. Her drink had a cherry in it. So naturally, I asked if I could have her cherry. She said, "I lost it a long time ago but still have the crate it came in." That line led to a night of incredible sex.

Never a dull moment and always down for a rocking good time!

Worst one I used anyway.