Answer:
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
According to the music industry, you can count on a midnight train and the devil to turn up here.
What is that which, though black itself, enlightens the world without burning?
What relies on columns but isn't a house, and asks for help but can't speak itself?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?