One time, my family and I were in Chicago downtown. We'd just had a nice dinner at a German restaurant, along with several beers for each man. It was delicious. When we were leaving, a beggar approached us. He said he didn't want money, but would be happy just with our left-overs. My grandpa regretfully gave him the left-overs.
He joked later, that he would have rather given him money, except that then, he wouldn't know what the money went toward. (we suspect cigarettes or alcohol, most times)