Buenos Aires is ready to host even the most demanding visitor.

If you are coming to Buenos Aires for a short term and need to be connected by internet with your work. You can do it here and even drinking a coffee in a Famous Tango bar, like "Los 36 billares" over Avenida de Mayo.

cafecito 

From Notable bars like  "Los 36 Billares" in Avenida de Mayo (downtown) to moderm bars in Palermo or places close to the exclusive neigborhood Recoleta you have free Wi-Fi service.

Lovely places like "Drink Gallery", a bar and restaurant in Las Cañitas has free wi-fi.  Chenaut 1794, is the address to go and enjoy your time and surf while drinking.

Branches of Cafe Martinez are located all over town  and  all have wireless connections.

Suggest your favorite here in order to  build a list about this subject.

Casa Bar - A stylish international cafe/bar in Barrio Norte. Has illy coffee, great wines & liquor selection at Rodriguez Pena 1150 (between Santa Fe and Arenales).