The Hotel Sales and Marketing Association International just recently held their membership meet at Kingsford Hotel in Parañaque City. They also announced the annual September Sale, where member properties will offer vouchers that's offered in very attractive prices and can be used in different dates of the year (without expiration). This initiative has been done by the organization and their members to help stimulate local tourism including properties outside Metro Manila.
If you would like to get these offers, simply visit their website HSMA.ORG.PH/SOS to get great deals that's not on other platforms.
I'm personally booking a few, see you there!