Chicago Shares is a voucher program that lets you order vouchers in $1.00 increments to give to people on the street asking for money. The vouchers can be redeemed for food and other necessities at places like White Hen, Dunkin' Donuts, Jewel and Subway, though they cannot be used for alcohol or tobacco. Or you could do what I do and carry around extra granola bars to offer people who are hungry, but the vouchers provide opportunity for a more complete meal.