Added Gratuity on a party of six (3 adults & 3 chi...

Added Gratuity on a party of six (3 adults & 3 children)? I m not sure if it s the owners rule, or the server took it upon herself to add the gratuity? I understand gratuity is added to a check to protect the server from being stiffed on a tip, but come on! It s a gamble I suppose, guarantee the server receives at least the gratuity, but risk a higher tip.
For what it s worth the meal was pretty good. The fact is with so many options in the area (Babylon, West Islip, Bay Shore, and Islip), I ll more than likely look elsewhere to dine. If I have a craving for one of their burgers, maybe I ll order take out, maybe....