In this classic photo of Goldie Hawn (taken by Bert Stern for Vogue) she wears a fun yet sophisticated black chiffon minidress by Jay Kobrin (for Maisonette).

Goldie Hawn In Black Chiffon By Jay Kobrin For Maisonette.
The flirty skirt and billowing sleeves keep this basic black outfit from looking severe, and the short skirt makes it very mod. Here are a few pieces upon which to build the look:
This leather basque from ASOS has a layered chiffon skirt with delicate pleats.

Leather Basque With Flirty Chiffon Skirt
Pair it with a sheer chiffon nightshirt in black (These sleep shirts are amazingly more practical for me as outer wear — blouses, jackets, etc. — than they are for sleepwear).

Sheer Black Chiffon Sleepshirt
You may also try the Johnny Martin Ruffle Chiffon Dress paired with another chiffon top or blouse. Then it’s find the black stockings, the perfect fun shoes, tie it all off with a wide satin ribbon in a bow at the front (easy to do with yardage from the fabric shop) and top it off with a large pin or brooch at the neck of the shirt or blouse.