When Metro Bank opened in London in 2010, it was a brash competitor in a seriously traditional industry. The vision is to redefine the relationship people have with their bank by innovating customer service. With such offerings as seven-day-a-week store hours and lightning-quick service-a customer can open an account and get a debit card within minutes-the bank built a foundation for fast growth, doubling in size year after year and soaring to more than 500,000 customer accounts.