It gave the students and their families a chance to interact outside the context of a karate class. Too often we see dojo brothers and sisters never get to know each other outside of class.
It even follows traditions of Osensei. It was common for students training at Osensei's home dojo to stay after a training session for a healthy dinner.
A big thanks to all of the families that contributed by either hosting, bringing food, or in any other way.