This isn't garage, garage is a style of music, not where its performed. As you say garage bands came about due to bands rehearsing in garages, Yes true but that is not the genre of music, merely the type of band. For example brass bands don't play brass music, brass isn't a genre. Brass bands play a variety of genres.
The genre garage is a style of dance music usually in 4/4 time or it can be "two step." The genre became known as garage as it was the style of music pioneered at the "Paradise Garage," nightclub in Newyork in the early 90's.
The term “Garage band†was coined in the early 1960s because most of the bands would rehearse in the garage and annoy the neighbours. The music genre, “Garage†bears no reflection on this.
on garage band rehearsal by Wilobowski
The genre garage is a style of dance music usually in 4/4 time or it can be "two step." The genre became known as garage as it was the style of music pioneered at the "Paradise Garage," nightclub in Newyork in the early 90's.