ADVERTISEMENT "Did you notice that this restaurant has two entrances?" asks Maria Joao Galante, Director of PR & Communications at the Corinthia Hotel, Lisbon. I confess I didn't. And this may seem like a banal observation, but it is in fact key to understanding how a cultural shift in dining behaviour is taking shape. I sit in a comfortable, bright room in Erva , the restaurant on the ground floor the 5-star hotel. Click the link and you'll not see anything about the hotel. It offers itself as