Reason 657793: Hall and Oates
"Daryl Hall first met John Oates at the Adelphi Ballroom in Philadelphia in 1967 while attending Temple University. Each was heading his own musical group at the time—Hall with The Temptones and Oates with The Masters. They were there for a band competition when gunfire rang out between two rival gangs, and in trying to escape, they ran to the same service elevator. Because of their similar musical tastes and close proximity inside the elevator, they quickly became acquainted. It would take them another two years to form a musical duo, and three years after that, they had signed to Atlantic Records and released their debut album. "
(Bio from Wikipedia... I know, such a scholarly source.)