Jerry I have also heard many players play the wrong chords even with the charts, no one is perfect chart or not,...and as for playing songs in the correct keys? if your a singer you play what key you need to sing in period,....if you wanna stick you face glued in a book while in front of people to me it looks wrong for a solo player in so many ways, and if you don't think so video yourself and look back at it,....if in a band and your in the background that's ok but not as an up front vocalist,...IMO
eye to eye contact is imperative when singing or playing performing etc,...but hey what do I know?
well I guess the experts here know better so be it.....
right now I have an Ice Cold Michelob and a shot of Jack to attend to have a nice evening everyone.