Pay for a Stranger's Coffee

Today's act of kindness is to pay for a stranger's coffee.  Although traditionally this is done for a hot coffee at a coffee shop, this could be any sort of pay it forward choice: drinks, sandwiches, etc.  If you don't want to give directly to a person, you can pay the cafe and just tell them to take it off of the next person's bill.  If you have homeless or people who need a meal that you see, you can ask them if they want something and go with them to eat or drink and have a conversation, or you can ask the waiter or waitress to go outside and deliver the drink/meal to the person. All ideas of kindness for today.