H.W.
My family volunteered at the Salvation Army in York at Christmas. They were greatful for the extra hands and it was a great civics lesson for my 12 year-old (us too for that matter)! They have things that go on throughout the month such as clothing and food distribution.
There are several soup kitchens and food banks in York as well. Second Harvest is one, I believe there is another called Helping Hands and I think there is a 3rd called the Food Pantry (something like that).
I hope this helps...good luck!