It gives him something to do, he gets to socialize with friends and family he hasn't seen in awhile, and the food is usually good.
At one recent funeral, the food was especially good. Instead of a pot luck where everybody brought something, they family of the deceased had it catered. I noticed that my father went back time after time for seconds, thirds, and even fourths.
"You're going back again?" I asked him, when he got up for a fifth time.
"Why not?" he asked me back.
"People will start to think you eat like a pig," I told him.
"They won't," he told me back.
"Why won't they?"
"Because I've been telling them it's for you."
Raising My Father
JimDuchene.BlogSpot.com American Chimpanzee