After all - it's a water wall

So here is an interesting way to make sure that there is reduced noise and increased privacy where people are eating

The wall of water is nice to look at, fairly soothing and ensures that the noise from each area is kept to a minimum

I am fairly sure that the cost of this method is why people are not doing this in more locations. As well as having to set it up, I am guessing that the ongoing cleaning and maintenance costs means that walls are are more effective option- but they are not as nice to look at