That sounds impossibly expensive; I'm sure there's some of the super-rich that do it, but it sounds more like a glossy story than something ubiquitous.
I would believe it if they "just" got tankers of clean water from elsewhere though. Plenty of people that have to survive off of water from tankers.
Basically it's more practical to keep the booze in the back of the casino and plumb it into a network of bars, instead of keeping track of which bar is running out.
Particularly when a single casino may have a hundred bars.
From a brewery in the historical center of Bruges to the outskirts IIRC. Which allows a working business better transport links so it can stay in the center to help avoid the city becoming completely Disneyland.
The only evidence I can provide is I once knew the groundskeeper for a group of properties owned by the super rich. One of his responsibilities was accepting the deliveries.
These properties were in a built up residential area.
I would believe it if they "just" got tankers of clean water from elsewhere though. Plenty of people that have to survive off of water from tankers.