Before the Beatles hit it big, they put in a tremendous amount of hard work.
A lot of it came in Hamburg, West Germany prior to reunification, where they played in the ‘60s. They played exhaustively, set after set, day after day and night after night. This was just 15 years or so after the end of World War II remember, and while young people had put it behind them, there were a lot of reminders of the war. There were plenty of veterans with amputations around, still fairly young themselves, and many former members of the Nazi party walked by them every day.