I have been to a bunch of those restaurants, earlier this year, and many of the diners are far from spending their last pesos- the clothes, shoes and handbags, hairdos and watches all indicate that there is plenty of money in Argentina still, its just not evenly distributed. There is no question that most people are having a tough time, prices are constantly going up, and keeping savings in pesos is silly. But many people I know, including some who are absolutely "poor", still have a few US 20 dollar bills, as security against inflation.
And there still is a substantial upper middle class and upper class who are driving new cars, and dining at expensive restaurants, this week and next.
Inflation porn, much like Disaster porn or Ruin porn always sell newspapers, but the truth is always more complicated.