I knew a well known chef that worked at a lot of these venues the people buying alcohol were upper middle class businessmen. High society doesn't really drink. Especially at social events. It was a surprise to me when he took me with him as a kid.
I don't mean that. It's very uncommon for the wealthy to drink. It's not really a thing. They all think it's a scam and they don't like their kids near it either. It's the reason so many girls do horseback riding. It's a controlled environment.