A number of years ago, some other musician friends and I went to a jazz club in Boston to see the group Spyro Gyra ... the band was dressed in jeans or khaki slacks and tee shirts or golf style shirts ... one of the guys I was with commented "remember when the musicians dressed better than the audience?" ...
A couple of years ago I saw the Ron Carter trio at the Newport Jazz Fest - blue blazers, dark slacks, white shirts, dark ties - class is class ...