Sixer dude Greg Pollowitz points me to this :

The restaurant was overrun that night by the Argentine delegation led by President Néstor Kirchner. Though Kirchner leans to the left and has aligned himself with Venezuela’s Marxist President Hugo Chavez, he didn’t seem to mind paying $40 a plate for spaghetti. But he restrained himself on the wine by ordering $70 bottles of chianti.
True to Argentine spirit, the group stayed till way past midnight and left a generous tip in cash.