It's no secret that F. Scott Fitzgerald was a heavy drinker, or that his wife Zelda blamed his drinking for the problems in their marriage and her eventual psychological problems. Fitzgerald explores the consequences of excessive drinking in his story "Babylon Revisited." Main character Charlie Wales is supposedly a recovered alcoholic, but the reader can't help but doubt his claim of reformation. Doubt is cast because he's still drinking (one drink a day, he explains, so that the idea of alcohol doesn't get too big in his mind). In "Babylon Revisited," drinking goes hand in hand with the partying, spending, waste, and self-destruction that, in Fitzgerald's mind, characterized the extravagant 1920s.
Charlie continues to flirt with his old life of destruction and extravagance throughout "Babylon Revisited."
Charlie's character is intentionally ambiguous; we are not meant to know whether or not he has his drinking under control.