Jazz pianist here. I had a weekly gig for a couple of years where the singer would choose songs and put the chord chart – | Eb C-7 | F-7 Bb7 | etc. – on the gra

Jazz pianist here. I had a weekly gig for a couple of years where the singer would choose songs and put the chord chart – | Eb C-7 | F-7 Bb7 | etc. – on the grand piano so the bass player could read it, and it was upside down for me. After a while, it almost seemed easier for me to read chord charts upside down!