Now, I can make your styling session super easy if you just pop into Decades. Naturally you want to look of the era, but at the same time, quite modern. How about this vintage Yves Saint Laurent Rive Gauche grey chiffon "tea dress." It may be from the 1970s, but it has a hint of the 1930s and add a large brim hat, sensible shoes, and a long strand of pearls and you will fit in without looking like you are en route to Trick or Treat. I love this dress worn with and without the coordinating poncho.
Doesn't this dress just beg for a flute of Veuve?
Yves Saint Laurent Rive Gauche grey silk chiffon tea dress and poncho, c. 1970s. Marked size 38, modern 4 to full 6. Repaired as indicated in photo.