Elsa Schiaparelli would give you the glare for a fashion faux pas, but Hermoine would put her in her place.
Peter Duchin, the pianist, was the son of Eddy Duchin, the bandleader. Either he or someone close to him wrote his wikipedia page; it just has that vibe.
As for Mr. Blackwell, he threw parties. No, that's not right. Soirees.