During the academical year the residents have the chance to help children, old and sick people; during the summer they can participate to voluntary social projects, like the ones we organise in Italy or abroad.
Simple activities but very important ones to understand how we can do so much with so little: the soup kitchen, Cathechism, assistance to old people. 
Obviously not even one of these activities is compulsory, but before saying no, we should consider how important two hours of our week can be. Two hours that can really make a difference for someone out there.