From what I hear that is also a Jewish tradition.....but seriously folks,
We hold the meal at our house with just the family (Mother-in-Law, kids, grand kids). We want it to be a family experience, a time to bond and reflect without the solemnity and guardedness that comes with Parish functions. It also lets the yopung ones share in the dialog without feeling intimidated by near strangers or adults.
We held a Seder meal at our parish last year for our year 2 Confirmation teens along with their parents and sponsers. It was very well recieved by all.