The Relatable Musician 6

DON'T CLAP WHEN THE BAND STARTS TRADING FOURS!!!

Same idea as inexperienced people who don't know audience etiquette for classical music.  You don't clap in between movements, unless it is something extremely worthy of mention.  Personally, I wouldn't clap, as seen in my post about not clapping. 

The same idea is not applied in the jazz world.  In fact, if you hear something you like, you vocalize it (but maybe not for a ballad).  Yelling in approval adds energy and encouragement to the atmosphere.  So there is little room for the audience to make error as an audience.
But little room doesn't mean no room.

I was recently in a summer jazz camp and the faculty/directors put on a concert for the students.  A popular jazz element for letting the drummer solo is called "trading fours".  In music speak, a player solos for four bars, then the drummer solos for four, then the player, then the drummer, and so on.  It's a very basic element.
However, the audience, which is comprised of jazz students, clapped for every four bar solo.  Granted, there are some beginners in the crowd.  However, people at least my level should know... And I'm not too high on the ladder. 

It isn't that they are ignorant and should know better as jazz students.  It's obvious that if you applaud every four bars, you're going to miss half of the solos because you're too busy making noise, drowning out the music you came to hear.  And it disturbs the people around you who know what they're doing...