When I looked it up to confirm my recollection, I found that it could be (1) any pool, (2) an indoor pool, or (3) a building containing an indoor pool. The OED seemed to lean toward any pool, while other sources leaned strongly toward the building. I think the meaning has been evolving differently in different circles.
Or: Google knows where your phone was when you paused to chat and look at seashell art. Also… it’s not complete tinfoil-hattery to suspect that Google is listening to your phone for marketing keywords, especially with the newfangled phones that support voice commands when idle.
When I looked it up to confirm my recollection, I found that it could be (1) any pool, (2) an indoor pool, or (3) a building containing an indoor pool. The OED seemed to lean toward any pool, while other sources leaned strongly toward the building. I think the meaning has been evolving differently in different circles.