The Konex is a popular venue for a range of events but "Bomba del Tiempo", the Monday evening drum performances, are probably the most talked about... And for very good reason; drums, beer and dancing around like a loonatic - can't get much better than that, right?
The "Bomba del Tiempo" night is probably one of the most fun experiences I've hadin Buenos Aires. The night won't cost you more than 200 pesos (dependant on how much beer you drink) so it's also light on the pocket if you're on a budget.
Go with a larger group for added fun. You can't take drinks outside... Or can you?;)
Mon-Tu: 18:00-22:00