"As you know kid, My son vanished and didn't come home after school nor even texted any member of the family on where he's heading and now we're very worried about him because the last time he did this, he got into rehab."
That is why most of the Yu's go to a place whenever they feel like they just want to relax and eat. It was the Kuya K's restaurant because aside from a relative who was the owner, Mariza was also a staff there which they felt secured. For a certain reason, they can't trust other places for their very important meetings which involve tons of money other than their restaurant and Kobin's. They knew some employees from the other restaurants might eavesdrop and hear the private deal so they settled to where the most trusted helper of their family work's at. Not only Mariza was the reason why they always choose to dine in the place but the food played a big role in their choice.