Bars: Try Recoleta, it´s an area full of bars. Also Palermo Hollywood, another area with a lot of bars ans restaurants.|
Cafes: Most tipical in Avenida de Mayo, the Cafe Tortoni, opens since 1900, it´s great. Also try La Biela in Recoleta.
Discos: in Costanera, you should try Pacha or Mint for Electronic music and La Diosa for latin, 80,s and 90´s music. They are really great, highlly recomended.
Cinemas: Village Cinemas in Recoleta or in bigest shoppings.