The biggest difference between New York City (4 trips ago) and Las Vegas (the most recent trip) is not that the Big Apple is aggressively authentic and the Glitter Gulch is appallingly inauthentic. That is merely the second biggest difference.
The biggest difference is that in New York City, where they have quite decent drinking water, there are no bathrooms to be found and yet, they free water at a lot of places. Inevitably, you will end up paying for a bag of chips at a Subway just to pee, I promise you.
And then we find that in Vegas, there are bathrooms everywhere - clean, plentiful and no more than a minute walk away from wherever you are - but the water tastes gross and it is most definitely not free. No waiter offers it, and every bartender charges you $8 for a small bottle of it. Sin city, indeed.