Thanks to my HK swim coach, Janie, I have really gotten into swimming for exercise and relaxation.  It has also taken me to many pools, lakes, and oceans in my travels.  Here is a photo of a public pool I went to in Paris.  It is in the student quarter and preserved from the 1950's.  The changing rooms double as lockers and the man with the big set of keys simply remembers you to come and unlock your door for you when you finish swimming.  If you are interested in going, just be sure to look at the frequently updated pool website in case of the frequent strikes or maintenance work: Paris Pools