Upon obtaining his PhD, Hugh Everett turned his back on physics and became a game theorist working for the Weapons Systems Evaluation Group at the Pentagon. While his thesis was being evaluated by Wheeler, he turned down an invitation to spend two months in Copenhagen discussing his ideas with Bohr et al. However, some years later, while on holiday in Europe with his wife and family, he spent two days in Copenhagen attempting to explaining his ideas to Bohr.
After a long and fruitless discussion with Bohr, Everett walked back to his Copenhagen hotel under the steel-gray afternoon twilight of the Danish sky, leaving quantum physics behind him. Drinking and smoking incessantly at the hotel bar - "he was sloppy and had a cigarette with him all the time." recalled Suzanne Misner - Everett had another brilliant alcohol-fueled idea, totally unrelated to the universal wave function. Jotting notes on hotel stationary while downing several pints of beer, Everett developed a new optimization algorithm for allocating military resources. It was easy to apply and fast to run on the bulky and slow computers of the time. When he returned home, Everett secured a patent for his algorithm, and it ultimately made him and his circle of military-minded colleagues rich. Everett finally had what he wanted: a never ending supply of booze, food, and cigarettes. Life was good.
(Source: What is Real? by Adam Becker)