If you were to ask John Lennon, Paul McCartney and George Harrison what made the band as great as it was — and it’s a question drummer Ringo Starr would be able to answer from his own experience — the odds are that they would say it was The Beatles in Hamburg..
Among the local places they performed in their native Liverpool was the Jacaranda coffee bar, run by Allan Williams, who would occasionally become their booking agent (in the days before Brian Epstein became their true manager). In August 1960, he informed them that he could book them in Hamburg, if they could secure a drummer, which — in the days before Ringo had joined them — they did in the form of Pete Best.
Source: Women's World