Arranger keyboard lessons used to be a big thing here in the Netherlands, they replaced the organ lessons from when home organs where pretty popular..

Tough over the last 10 years they are slowly dispearing, where piano lessons are still going strong.. However, there is a new thing surfacing, its called keyboard player, where you learn and play all kinds of keyboards, like piano, organ, synth and... Arranger, where arranger playing actually focusses on playing acoustic instruments realisticali on an arranger... And some basics to music production..but also playing in bands and such... Its very very diverse..

Its not a beginners course, but a course for mainly medium level piano trained students..