A tradition in the cafés of Naples is to order a caffè sospeso – literally, a coffee "in suspense" (aka. caffè pagato, or "paid coffee") – as a sign of your good fortune. When a sospeso is ordered, the customer pays for two coffees, but only receives one. That way, when a person who is homeless or otherwise down on their luck walks into the café, the person can ask if there are any coffees held in suspense, and can have one as a courtesy of the first customer. Though the custom has been a part of Neapolitan society for many years, it is somewhat less common today.
I think this is a wonderful idea as someone who can't get by without coffee and a great way to give someone who needs it, a lift. Can we introduce this in the UK?