Sex education camp. Parents think their kids are there to learn music, but fail to realize that extracurricular activities often include non supervised sex education between the students that are far away from the parents. Basically many students are exploring sexual activities often for the first time or teaching other students. So Band Camp is a good thing in this definition, something to look forward to by the students.
"Band Camp" is the cannotation of summer sexcapades at whatever camp the youths may be going to.
American Pie, the movie, is the origin of this definition.
"This one time....at band camp...I stuck up a flute up my pussy...." Line from the movie