Por Aca is a popular local hangout on Aristides that's all about rock and roll. It fills up around 1:30 AM, when partrons are allowed to start smoking cigarettes. You can dance among the throngs of partiers until 6:00 AM. Tuesdays and Wednesdays, ladies eat and drink for free (bar shots & pizza). Av Arístides Villanueva 557; +54 261 420 0346.