Ihate to say it, but a former high-rolling Chicago exchage type once told me that in the high-end restaurants it was de rigeur to hire fastidious homosexual waiters, and Hispanic bus boys. In theory, such hires would make the hire based on the impression it would leave on the guests.
Waiters in cummerbunds and Maitre ‘d in Tuxedo or just replaced with men wearing name tags and aprons? Big difference imho between the two.
Can a traditional elegant restaurant get away with a all male serving staff these days?