But .... and I hold my hands up as one of the people who missed the initial slant of the question ...

why should entertaining one's guests thus have been viewed, as by Wilde in the passage quoted, as decadent and depraved, a symptom of the downward drugs·n·perversion primrose·path that Dorian Gray [note spelling btw] was sliding acceleratingly down? What did he think so wrong with exotic 'Folk·Roots' style entertainment?

Because now I've realised what the actual question was - that is, why is that considered decadent, not (as I and others initially took it) was it actually there to be seen at the time, I'd quite like to know the answer too :)