Tango at Carnaval

During the last round of Carnaval, there was no act the first hour.  Why delay it instead of having it end closer to a decent hour?  This is Uruguay - no one would come that early.  Anyway, during the first hour, they had a small tango when we were there.  Unfortunately, either because they weren't used to the shape of the stage in front of the curtains or because they just weren't good, it wasn't a good show.  We did get a couple of nice pictures, though.  There is a tango section of Carnaval competition, but it's not held at Teatro de Verano and not well publicized.