I arrived at 6:45pm, when I went poolside they were a young couple doing yoga exercises, only one person in the water and he got out while I was changing. When I got in about 6:50, I was the only person in the pool. 8-Lengths make about 1.12-miles. I breezed the first four alone in the pool. The water was perfectly still, clear, dark, and lit by the spot lights.
By the time I'd finished 4-lengths or two up and down, there was a female triathlete putting her wetsuit on, by the time I'd done 6-lengths she was in but swimming on the opposite side. When I stopped after 8-lengths I was surprised, but not shocked to find a woman standing in the shallow end topless. She waited until the other swimmer came back, they exchanged a few niceties, the triathlete said "Aren't you cold?" - shortly after which they swam off together.
Over on the side of the pool, the young couple had graduated to moves I can't even describe, Yes, it wasn't anything unusual, just another evening at Barton Springs!
KEEP AUSTIN FANTASTIC!
[The pool can be seen in the last 3rd of this you tube video]