There used to be sinks very similar to this one at The Kingdome. More than once I saw somebody peeing in one although I never saw more than one at a time i.e. an Italian firing squad. :-)
I remember the troughs at stadiums where you peed right next to a guy and you could see the guy on the other side. It was weird and uncomfortable to pee when you were little.
I remember that and I used to get "stage fright". My dad was in The Air Force and told me they didn't have partitions between the toilets. He joked about "talking to your neighbor while taking a dump"
