Por quilo lunch, the feijoada Saturday, and the açaí that isn't a smoothie bowl

"Por quilo" restaurants let you fill a plate from a buffet and pay by weight; they're the everyday lunch and the best value in every city. Feijoada, the black bean and pork stew, is a Wednesday and Saturday tradition. Açaí in the north is eaten savory with fish and farinha; in the south it's a sweet bowl. Churrascarias bring meat on skewers until you flip the card to red. Cachaça in a caipirinha is the drink; a 10% service charge is usually on the bill.