19. John Lennon leads The Quarry Men . Paul Mccartney watches from the crowd on the day they would meet. [July 6, 1957]

Source: reddit.com

20. U.S. chess prodigy, Bobby Fisher, plays 50 opponents simultaneously at a Hollywood hotel. He won 47, lost 1, and drew 2. [April 12, 1964]

Source: reddit.com