Horrible Music in the Clubs

Hollywood in the mid and late sixties, up until Easy Rider finally changed the mindset, had this tendency to create their own "rock" music for their movies that were horn based, lacked vocals and were more poppy than rocky. Someone in another comment called it "neutered for the over 40 crowd."

But what really BUGS me in this film is that Harper is in a club, they have a band with long hair playing guitars, there are young people dancing like crazy, and they have this horns neutered pop music instead of real rock yet there are NO horns in the band.

I mean come on! Its on thing to have that terrible music replace the real rock of the time, but it's another thing to have the sound of horns when the band is only guitars.

I wonder if this was a later change by the producers and that the film at first had real guitar rock in those scene?

Did this bother anyone else? Does anyone know anything about if the producers or studio changed the music?