Close-up: Brazil's 'pay what you weigh' restaurants
This BBC News series focuses on aspects of life in countries and cities around the world. What may seem ordinary and familiar to the people who live there can be surprising to those who do not.
For many people living in one of the world's richest cities eating out has become a regular feature of life - but, as in other parts of the world, choosing just what to eat can be a problem.
In recent years, a new kind of eating experience has thrived in the Brazilian city of Sao Paulo - the self-service or "kilo" restaurant.
Customers pick as much as they want from a wide range of dishes then weigh their plates to find out much they have to pay.
The kilo concept has proved so popular that gourmet restaurants are beginning to adopt the idea.
A hungry Paulo Cabral joined the crowds to find out more.