Ummm, I guess it's just me, but it just seems to be getting more and more about the technology and less and less about the music. I just can't imagine a professional entertainer standing in front of an audience scrolling through an iphone looking for a song for five minutes.....or even two minutes. I know some people try to be prepared for any request but I don't think that's realistic (although some pro's have amazing repertories). If you don't know the tune well enough to fake it, 'fess up and move on. I know it's different with a band, but we always had a list of (@200) tunes that we could play 'cold', and if a request wasn't on that list, we would just say no and offer a substitute. I guess the public (or the club owners) are more demanding these days.

Here's another idea; post a sign on the bandstand stating "WE DON'T TAKE REQUESTS".

chas