The rich and playful had hobbies too. Among the foremost was drinking. The new laws on prohibition had little impact on the flow of alcohol.  

Absinthe FAQ 

Everything you always wanted to know about the pale green liquor that was the soul of artistic living. The Absinthe FAQ really belongs in the "gilded era" - Absinthe is made from wormwood, and is even more toxic than alcohol - by 1919 it was largely a thing of the past in America.. But the drink was still fantastically popular in Paris, where the "expatriate American" culture gathered around Dos Passos, Hemingway, Gertrude Stein, etc.

An account of the career of Herbert Hoover, who suceeded Calvin Coolidge, and was the President during the Stock Market Crash of 1929.

A 1921 apprenticeship contract with the REO Motor Car Company.

An excellent search engine, which purports to have 20,000 individuals indexed.  Great for checking birth and death dates. 

A general history of the soft drink industry, including a timeline which covers the 1920s.

The 20s saw the invention of the Cocktail. Up until this point, cocktails were neither very popular or very widespread. The Highball is mentioned in the teens, and the British had been drinking Gin and Tonic to get their Quinine since the previous century. But "mixed drinks" in the vast variety we know them now simply didn't exist. Enter prohibition. Cheap alcohol was poorly made, with no quality control. It tasted terrible. Bartenders in the speak-easies mixed it with sweet juices to make it tolerable.  The result tasted pretty good.  The upshot is that millions of young folks who would never have taken up drinking because they didn't like the taste of hard liquor found a palatable way to become "spifflicated." This excellent feature by Hot Wired Magazine covers the range of cocktails, not just those of the 20s. But you can search for the term, or determine if a specific drink is period or not. 
 

 BOOK REVIEW: "Centers on the literary giants at the Algonquin roundtable and spirals outward, encompassing the worlds of advertising, popular music, film, and politics set against a background of a prospering American economy, the paralysis of war-ravaged Europe, Prohibition and the appearance of psychoanalysis. All these factors--and the rising skyline--made New York City a cultural beacon for the world, author Anne Douglas says."

 BOOK REVIEW: Same book as above.  A review with some interesting historical notes.