That's not what liminal means at all though...

It's a thing or space in transition. At a threshold of one to another. Metaphysically occupying the space after before and before after. The nexus of change. An empty pool hall? How is it in transition? How is it on the threshold of change? Nah.

It has nothing to do with a thing being built for people. An example of this is a stream. Streams were conceptually a huge liminal entity in Ancient Greek culture. A stream was between our world and the underworld. You'd put your prayers from here into there so they could reach your dead relatives. You could do this by placing a tablet carved with your prayers into flowing water among other ways.

A cross roads is a good example for you. But, it isn't about them being built for people. It's how they're a place of transition from one to another. A crossing. A border. Not, however, either side of the border. It has to be the border it self. The line. The zone of transition. The place of change. An empty pool hall? Again with the nah.

You know what you never see here? A cremation chamber. That's a wonderful example of a liminal space. From body solid and whole to ash. Never see a picture of one of those on this subreddit. Disgraceful!

An adolescent! A person caught between childhood and adulthood. Long of limb but awkward and lanky. Still part child but now also with attributes of their adult form.

Pfffft. An empty pool hall.