In the 50's, 60’s, and 70’s I played with “Rock and Roll bands no problem with the keys they played in. I play in the French Quarters 5 nights a week. I had to play many tunes I was not familiar with so, I had to use a fake book. I could transpose out of the "C" book 1 note higher and got good at this. I was always grateful for this gig as it is the one that I learned many “Jazz Standards”.

In the "Big Easy" in those days, you never knew who was going to call. I had a “Country Rock” band call for me to do a gig at the municipal Auditorium in front of about 6 to 8 thousand people. They did Elvis tunes. Yes in E, A, D. That is where most of the old country tunes are written and played. I’ve had more than a few guitar players tell me it was the easiest key for them to play in just as most of the b chords are easier for sax players. With the exception of Db and Gb.

Of course, along with the b keys F, G, C is easier for the tenor sax also.