[unknown] It is at the public pool, not our apartment. There are a few pools here, but the old one does this and I have never been but a group of us are going Wednesday. They do this every Wednesday. Nude lap swim first, then nude open swim. I will see how it is. This is not an uncommon thing here, there are a few nudist resorts and a nudist community not far away. And every summer, Amsterdam has a nude bicycle ride. There are no laws against nudity here. But you still have to be polite.