Gaucho Cafe de la Paix has not been around for a couple of years...it is now a Freddo...And by the way, a very nice Freddo is the one at the beginning of Calle Florida, off Plaza San Martin...second floor is very nice and comfortable. Also the rather newish Cafe Palacio Barolo, located in one of my favorite buildings in Buenos Aires...and Bar El Federal in San Telmo been there since 1864 (not in the orginal location) and a fantastic antique bar.
Forgot all about the Croque Madame Av Libertador 1902 (Museo de Arte Decorativo) great little interior space and a small garden seating area in the rear.
Sam