What is the best supper club in Buenos Aires?
Belushi Martini in palermo soho, ISABEL is in the same area. Asia de Cuba for hip-hop. If you like electronic music in pacha, Milion for cocktails, they have a 20s beaux-arts atmosphere. Sorry I don't remember more. Have good flight!
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I know the term Supper Club can mean different things to different people, but going with the sort of "underground dining" definition, Casa Saltshaker is probably the most well-known, which both is good and bad.
The food is great and there's a terrific communal vibe, but everyone knows about it which makes it less fun. I don't know if they still do it this way, but they used to serve dinner based on a theme, which was always a lot of fun. I'd say it's a pretty safe bet!