the swimming pool/ a swimming pool

[Vladv1]

"There was a large high-rise on Sunset with a swimming pool on the roof called the Hyatt House. We discovered that the Hyatt was the place known by all the bands who stayed there as the Riot House, after the exploits of Led Zeppelin drummer John Bonham, who liked to toss TVs out the window when he wasn’t riding his motorcycle down the corridor, and the Who’s Keith Moon, who liked to stock his bathtub with piranha fish, when he wasn’t trying to drive a Roll’s Royce into the swimming pool. (Not so easy with the pool on the roof, but if anyone could have done it, Moony could.)".

"Rainbow In The Dark", Ronnie James Dio.

Could you explain the use of the articles in the bold. I know from the context that " to drive a Roll’s Royce into the swimming pool" happened not in the Hyatt House, so why use "the" if we introduce a new swimming pool? As to "Not so easy with the pool on the roof", though we are talking about the swimming pool of the Hyatt House, would it be better to use "a pool on the roof", since it is one of many swimming pools. Sorry for the confusion.

 

[SoothingDave]

What context is telling you they aren't talking about the pool on the roof of the Hyatt House? That's what I understand from reading this.

They first say it has "a pool" (introducing it), then refer to "the pool" on the roof.

 

[Vladv1]

What context is telling you they aren't talking about the pool on the roof of the Hyatt House? That's what I understand from reading this.

They first say it has "a pool" (introducing it), then refer to "the pool" on the roof.

Because I read that Keith Moon was trying to drive a car into a different pool in another place.

 

[güey]

Because I read that Keith Moon was trying to drive a car into a different pool in another place.

That's still not obvious without quoted relevant context. But even if that's so, it could then be a reference to that other pool you are talking about.

 

[jutfrank]

The use of 'the' in both cases follows what's usually called the 'uniqueness' rule—there is only one swimming pool at any given hotel.

Imagine any hotel in your mind, real or not. Now imagine the front door, now imagine the reception desk, now imagine the swimming pool, etc.