Been to one.
Imagine a DCM clinic with all of the boring sucked out of it.
The instructors tend to be really fired up about their mission of teaching rifle marksmanship. I had a grand time just shutting my mouth and opening my ears and watching how much fun everybody around me was having.
As a bonus, one of the instructors at ours was an ROTC student from a university in TN who had brought extra 10/22's with slings and tech-sights from his school rifle team. That just tickled me pink and made me proud to have lived in TN.