I've seen the cena/shows at La Ventana and Senor Tango and they were both good professional shows, on the order of a Las Vegas extravaganza or a Broadway musical. Great dancing, singing, the whole works. Both include a gaucho spinning bolos and a blonde singing "Don't Cry For Me", neither of which is tango, but what the heck. They're good fun. The Senor Tango is bigger and flashier, featuring a rotating stage and for one number, and I'm not making this up, two horses. And they had blonde twins singing "Don't Cry For Me," or did they sing "Don't Cry for Us?" I can't remember, but it was great and my visiting relatives loved it. So did I. Then we took them to the Milonga in Palermo at the Centro Cultural Armenia, a real local milonga with free lessons for two hours before midnight and then the dancing. All ages having a great time. My relatives loved both, the show and the milonga. The possibilities are endless. In San Telmo there's a milonga on every block. Have a great time!