Nadi looks like she prefers watching humans crowded in roped-off swimming corridors, it's concentrated entertainment for dog eyes I assume, but doesn't sound like a joy for any potential swimmer. I've never swam in big city beaches here in Cambodia, mostly because there is almost no coastline here, but in Sihanoukville, the only big town with proper sand beaches, has unfiltered sewage flowing into from illegal poo pipes that the government seems to not care about.
Well, I guess if you spend the extra money, you can justify it by seeing Nadi's joy in loading her fur up with hot sand.