[1] During the early 1920s, Throckmorton resided in Washington, D.C., where he created sets for stage productions by Howard University, a historically black college.

[2] While associated with Howard University, he operated the Krazy Kat speakeasy in Washington, D.C., a gathering place for artists and intellectuals.

[12] As a pre-Raphaelite impressionist, Throckmorton believed that artists should pursue their vocation day and night by surrounding themselves with appropriate settings that inspired creativity, and the venue fulfilled that purpose.

[13] Due to its courtyard and tree-house, the establishment became as an idyllic haunt for artists, bohemians, flappers, and other free-wheeling "young moderns" during the Jazz Age.

[14] A frequent club habitué was Kathryn Marie "Kat" Mullin,[a] a model and sketch artist known for her radio performances as a singer and ukulele player with the Crandall Saturday Nighters.

[7] His many works included The Hairy Ape (1922), In Abraham's Bosom (1926; Pulitzer Prize, 1927), Porgy (1928), the American premiere of The Threepenny Opera (1933), Sidney Howard's Alien Corn (1933), the 1935 American premiere of Federico García Lorca's Blood Wedding (retitled as The Bitter Oleanders), and a 1942 production of Nathan the Wise.

[5] Many notable artists and stage designers worked with Throckmorton at the Provincetown Players, including Mordecai Gorelik,[17] Alexander Calder,[18] and Robert Edmond Jones.

[20] They produced at the Old Rialto Theatre a series of successful revivals of old-time melodramas from the gaslight era,[9] "complete with peanuts—hisses for the villain and cheers for the heroes.

[8] In his final years, Throckmorton lived with his second wife Juliet Brenon in semi-retirement at 33 South North Carolina Avenue in Atlantic City, New Jersey.

[28] A model, sketch artist and later costume designer, Mullin was a frequent habitué of Throckmorton's speakeasy known as "The Kat" in Washington, D.C., and she was known for her radio and stage performances as a singer and ukulele player with the Crandall Saturday Nighters.

[31] After four years of marriage, Kathryn sued Cleon for divorce on December 17, 1926, after catching him in an extramarital affair with an unidentified woman—possibly silent movie actress Juliet Brenon—in their Greenwich Village apartment in New York City.

Immediately after his divorce from Kathryn Mullin, Throckmorton married his second wife, silent movie actress Juliet Brenon (1895–1979) on March 13, 1927.

[37] During the 1930s, Throckmorton's and Brenon's Greenwich Village apartment became an after-hours salon for thespians, artists, and intellectuals such as Noël Coward, Norman Bel Geddes, Eugene O'Neill, and E.E.