Fabbri's clients pay $80 to $160 (about R600 to R900) each to slice into steaks while watching a movie about the 19th-century roots of tango, Argentina's signature melancholy music and dance. After dinner, they watch a dance show accompanied by an orchestra.
The theatre fills up every night of the year except for Christmas Eve, when it's closed.
Fabbri and businessmen like him are enjoying a resurgence in the popularity of tango, on the back of a boom in tourism.
The tango is a $450-million-a-year industry and accounts for 10 percent of entertainment spending here.
Theatres like Fabbri's employ choreographers, dancers, musicians and costumers, all contributing to a tango economy that is growing at 25 percent a year.
Argentina has seen a surge in tourism since the deep economic crisis in 2002, in which the exchange rate of the peso fell sharply, making travel to the country cheaper. The rise in tourist numbers has increased demand for tango dinner theatres.
"About 85 percent of foreign tourists go to a tango show because it combines two things they seek: seeing the tango and eating well. The beef is key," said Marcelo Ruggieri, who heads a business chamber representing 13 tango dinner theatres.
"If you don't see this, you don't see Buenos Aires," said Greek tourist Michael Dimadis, 30, who watched a tango show with European friends. "It'd be like going to Greece and not eating tzatziki."
Hardcore tango enthusiasts - 25 000 a year come for classes - attend social dances known as milongas, splashing out on dancing shoes and outfits.
Fabbri began dancing the tango in the early 1990s, mingling with veteran tango dancing legends. He noticed tourists went to dance halls to soak up tango culture and, sensing a business opportunity, opened a dance hall, then a 24-hour cable television tango channel, and now his theatres.
He launched Esquina Carlos Gardel (Carlos Gardel Corner), named after tango's best-known singer, seven years ago, and he and his partners are about to open a 1 200-seat establishment.
Few locals shell out for tourist-oriented tango spectacles, but a new generation of Argentines has embraced the national dance, attending a growing number of dance schools.
Economist Jorge Marchini says the foreign fascination with the tango has awakened Argentines to their own culture.
"In my youth in the 1970s, we said no to tango and Argentina had good rock music. Nowadays the tango world is full of young, beautiful people - it's good for everyone."
