The atmosphere of Porto when we arrived on the holiday weekend was definitely that of a street party. The weather was ideal for it: sunny and warm. Tour guides carrying bright green umbrellas bustled their groups everywhere you looked, children played patty cake while parents lounged on the lawn in one of the squares, art and craft venders sold their creations under white tents in one of the parks. People gathered around small cafe tables enjoying drinks and ice cream. Cameras and cell phones were hard at work everywhere and street musicians entertained the crowds throughout.