Hi, My argentine wife recommends the Botanico gym on the corner of Santa Fe and Armenia. The pase libre is 90 pesos a month, she likes the classes, the dressing rooms are clean and all the machines look brand new. It's small but she likes it. I used to go to Always on Paraguay near Gurruchaga which is like an aircraft hangar with lots of machines but last time I went the machines were all on their last legs and they have raised their prices to 120 pesos a month. BTW if anyone knows of a gym with Concept2 style rowing machines, please let me know, I can't find one here.