To avail of senior citizen discounts at restaurants in the Philippines, you need to be at least 60 years old and present a valid senior citizen ID issued by the government. Many restaurants require you to inform the staff before ordering to apply the discount properly. It's important to note that the discount typically applies to dine-in meals only and may exclude certain items like alcohol or promotional packages. For the most accurate information, check directly with the restaurant or refer to local regulations regarding senior citizen benefits.