syngirl said:Demi Center -- they have a few different locations -- http://www.demicenter.com/
I guess the one in Recoleta would be closest for you? You don't need a turno, though you can book one. My only annoyance with them is they close early. I think 7 on weekdays and only until 6 on saturdays.
I always go to Demi Center, it's the best wax I've ever had!