Word play
People in Buenos Aires, especially the locals (porteños or people of the port) don’t get much sleep. Many commute for several hours to get to and from work during the week, so they are used to eating late and rising early. On weekends, they might get to sleep in, but those who like to party won’t be adding many credits to their sleep bank because nightlife doesn’t get started till close to midnight: quite a challenge for visitors used to eating at eight and going to bed before twelve.