Cathedrals: public sacred space?

As I understand it (which is very little) the medieval cathedral was a funny mix of the sacred and the secular. Cathedrals still are, you might say.

Cathedrals would have been one of the few large buildings in a city and would be a meeting place as well as a place for divine worship.

It's good to have buildings that are explicitly set aside for the glory of God, but I don't think that means that they can never be used for other lawful purposes.

Cathedrals have more of a public character than most other churches where there's a "private" more family feel.

As far as we have the resources and the opportunities, and if we've nothing better to do, let's open up our church buildings.