mmm... cold beer at this hour is a good idea!!!!!!!
the most famous Octoberfest here is in Villa General Belgrano (provincia de Córdoba) and if you go to Brasil in Blumenau city. If you go to Villa General Belgrano you can also reach as part of the tour La Falda and visit the ruins of Eden Hotel
The argentine one is famous for a bit descontrolada. I never went there in Octoberfest´s times . I prefer the Black Forest Fest two blocks from my house or to go to the german stand during the Colectividades fiesta at some hour where there are not too much alcoholized people around.