The Vogue in London
"For a day the topic in London newspapers was the production of a blue cocktail. Every other color is possible, and the result of the discussion was the discovery that the only two colouring agents possible were the juice of the gentian (a blue flower which grows on the high Alps) and a French sirop known during the last century but not made now.
"A famous dress designer invites one to a dress parade and a cocktail party in the same reach - or an elaborately engraved invitation is sent, entitling you to spend an hour or so in a parchment and gold drawing-room, sipping from gold filigreed glasses, while mannequins parade in lovely clothes.
"At one of these combined functions given recently by Madame Luander and her sister, Lady Glenmorris, mannequins displayed a novelty - the cocktail party frock - designed specially so that it is suitable for both late afternoon and dinner wear. Made in colored lace, the ensemble was particularly charming. In most cases the frock was sleeveless, and had an accompanying short coat of the same material, which could be slipped off to reveal the evening outfit."
To get in the mood, here's a recipe for a Minnehaha Cocktail from Melbourne's Argus in September 1928:
The juice of one-quarter of an orange
1 fluid ounce Dry Gin
1 fluid ounce French Vermouth
1 fluid ounce Italian Vermouth
1 dash of Absinthe
Half fill the cocktail shaker with broken ice; add all ingredients except the Absinthe. Shake well and strain into cocktail glasses – then add the Absinthe.
Note: The original recipe calls for 1/6 of a gill of each spirit. An imperial gill is 5 fluid ounces.