yes recoleta is sat and sunday,,,,, you dont need reserv but if you want to sit on dance floor not in back you should call ... I will check to see if I can find out schedules,,,, of orchestras....or when you get down there stop in they are pretty helpfull...(sometimes) 10 pesos 3$ admission ( but that is a subject of dispute because thats what they charge tourists,, porteno's 5 pesos...) but for $3 who argues