Nightlife area by Manila Bay
There is an awesome plaza next to the Culture Center of the Philippines near Malate area and Manila Bay. There are bars and restaurants that are open very late and nice for meeting locals and foreigners. We stayed at a condo along the bay and enjoyed it very much. We recommend groups to stay there, as location was perfect for day sightseeing and nightlife nearby.
Insider Tip:The condo we stayed at was central location so we got to see the entire city at night from the rooftop. I recommend it to anyone staying in Manila in groups.