Plenty of pleasure to be found in Makati for a day. Dec 6th is a Saturday, right? Salcedo market. Many of the same vendors are at Legazpi park market on Sunday. The Spa for reliable, inexpensive massages. Greenbelt Mall for restaurants and a bookstore whose paperbacks will get you through those long idle evenings in Anilao. Ayala Museum is worth a couple of hours.
Further afield, Walk This Way tours will make Intramuros come alive for you. Maybe save it for your stopover on the way back, if there is one. Likewise on the Corregidor tour. Your time may be tighter than you think on the 6th-7th.