Sao Paulo is quiet this weekend. There are blocos out dancing in the streets – I can hear them coming up from Vila Madalena, as can the barking dogs, followed it seems inexorably by emergency sirens – but many folk have gone elsewhere to sample the delights of carnaval, while the city known in Brazil for hard work (and some say for not knowing how to play) pauses to draw breath. It rained heavily today, as it can in January and February. That dampens carnaval spirits. This year’s accessory is the clear plastic disposal anorak.

Today I strolled down Rua Augusta to the corner of Rua Oscar Friere. It’s an interesting mix – Oscar Freire is all designer boutiques and high-end restaurants, though the locals say that trade is a little precarious. Augusta on the other hand is known for drag queens and prostitutes. In previous generations it was known for chic coffee bars and the fashionable youth style of la dolce vita.

Center Oscar Freire Augusta

Center Oscar Freire Augusta

The building on the corner is an elegant example of Brutalism, the raw concrete cast in flat facades pierced by rounded windows. The concrete of the balconies is harder to keep clean, and the inhabitants have domesticated them with paint, but the faintly nautical effect can be glimpsed behind the abundant plant life and inserted air conditioners.

A graphic sign used to grace the shopfront on Oscar Freire, showing a man drawn in black and white dancing with a coloured umbrella. (Google Earth is keen on copyright.) Lanchonete (pronounced lanchonetchi) Frevo has been here since 1956.

Entrance to Rua Oscar Freire 579

Entrance to Rua Oscar Freire 603

On Sunday afternoon it’s quiet, though it does a brisk trade during the week. The diner is famous for beiruites – a cross between a hamburger and a steak sandwich, it’s a slice of beef with sliced tomato, melted cheese and oregano, in toasted pita bread. A small one is a decent snack. A chope of draught beer makes a refreshing accompaniment. Service is copious, fast and friendly.

The business is built on this simple fare. The decor, unchanged since it opened, has moved from being out of fashion to being a design classic, by virtue of standing still. Even the appliances – scales, beer pump, air conditioning – are vintage. They don’t make ’em like that any more.

Wire figure 1956

Wire and wood figure 1956

Primrose yellow tiling, fixed red bar stools, and wooden decoration of the supporting beams, window sills, hanging lamps and the front of the kitchen – styled as a beach hut, complete with plastic palm trees – anchor it firmly in the 1950s. The same colour scheme of grey, red and primrose yellow is used in its upmarket sister site.

Frevo Shopping Iguatemi

Frevo Shopping Iguatemi

The square tables start to fill up, some pushed together for groups of family and friends. I order dessert, discovering that they do not serve coffee, so I order another chope.

He dances over the beer pump

He dances over the beer pump

The bevelled mirrors bolted to the walls, even the taste of the dessert – strawberry ice-cream with tinned fruit salad – is 1950s. Frevo is an institution, one of those places which has been around long enough to boast about it, with black and white photographs, with regular and one might say ancient customers, and a venerable patron.

Dancing couple, cool breeze

Dancing couple, cool breeze

And the name? Frevo is the music and dance of carnaval from Recife in the north-east of Brazil, the umbrellas integrated into an acrobatic dance routine. Perfect for a rainy Sao Paulo carnaval afternoon.