Many 'City Hall's in europe have (big) pipe organs, so it's not just religious organisations. But it's the same deal, you need a building with enough space, and

Many 'City Hall's in europe have (big) pipe organs, so it's not just religious organisations. But it's the same deal, you need a building with enough space, and space that doesn't need to be taken up with more pressing matters. Some bigger theatres have them, which I guess would be another obvious use of them