The Maharashtra Cabinet on Wednesday approved its 'Mumbai 24 hours' policy allowing malls, multiplexes and shops to remain open round-the-clock in the city from January 27.Noting that London's 'night economy' was five billion pounds, state Tourism Minister Aaditya Thackeray told reporters here after the Cabinet meeting that the government's decision could help generate more revenue and jobs, in addition to the existing five lakh people working in the service sector.