Night: Night life is more like “morning life” in Buenos Aires. If you arrive to a party at midnight, that is considered extremely early. If you arrive home at 5:30 am (when I would wake up in Cairo), that is also considered early.
Day: Scenes from the San Telmo Sunday market that sweeps down the entire Defensa Street and a few connecting side streets. Music, leather, mate, tango, head scratchers.