A number of years ago I got a note while on stage. I opened it expecting to see a request (probably for "Fields of Athenrae", or "Cat's in the Cradle") and to my shock it said "excuse me for being forward but I think you're very attractive. Could I take you out to dinner?" with a name and the location where she was sitting. I was dumbstruck. Now, you have to understand that a lot of performers have seriously low self images and would be far too embarrassed to employ any of the lines used in this thread. The courting process in folk music often is related to the songs (see Sandy's post) followed by long discussions, many cups of coffee, chess(!??) and can often result in breakfast the next morning.
Over the rest of the set I quickly found my performer's extrovert side rapidly diminishing and the old shy introvert one taking over. Also, I was VERY pleased and looking forward to finding out who this was. At the end of the set, I went over to the corner of the room to meet this person and was confronted by my friends Bill and Norm, who I hadn't seen come in, laughing hysterically! "If you want, we can send you TWO notes next time" they burbled. I'd been seriously had.