Okura Garden Hotel Shanghai | 花园饭店（上海）

This pool fits the description on the website here. It is clean and reasonably ventilated. There is lots of natural light through a clear roof. It is very suitable for lap swimming and there was at least one lane (out of three) available every time I wanted to swim. You are required to wear a swim cap.
[July, 2016]

Still nice; still not crowded; I always had lane to myself.