I just realized that I've given a wrong impression here.
We didn't feed people coming to pay their respects at my Dad's visitation. The food was kept in a side room for the family to nibble on, because the viewing happened over the dinner hour, and because we have a bunch of teenagers in the family that must eat every 10 minutes or collapse in a heap on the floor
I've never been to a visitation where I got fed. I think it's bizare enough to have to eat after attending a funeral service. Personally, the last thing I want to do then is eat!