The workforce in Manila covers everything from daily, minimum wage earners to expats being driven in Beemers. Standard working time varies, especially with the proliferation of Call Centers, but the usual working hours are 8AM-5PM. Given that the traffic within the Manila escalates exponentially as the day begins, it's always better to leave early for meetings.
There is also a local saying known as "Filipino Time" wherein it was expected that the attendee would be late by up to one hour. However, this has been significantly reduced through the years, although the bad traffic is usually and realistically cited as the main cause for missing one's appointment.
Makati City is the country's main CBD, or Central Business District, and, on every given weekday, it seems that all roads lead here. Multinational firms and big businesses hold offices here.
Ortigas Center, which cuts across the borders of Mandaluyong City, Pasig City and Quezon City, seems to be the alternative CBD, with companies such as the Asian Development Bank headquarters and the World Bank Manila office located in this vicinity.