Samba Saturday: This is a must! Live Samba music is played in many of the city’s bars on Saturdays. The best place to experience live Samba and traditional Saturday food (feijoada) is Bar Samba in Vila Madalena.
MASP (Museu de Arte de São Paulo): São Paulo has many great museums, but MASP is the city’s best art museum.
Antiques + Handicrafts + Street food: On Sundays, the area around MASP on Avenida Paulista hosts two great outdoor markets. The space under the museum becomes a huge antiques market, and the space across the street is a handicrafts market where great street food is sold.
Parque Ibirapuera: Parque Ibirapuera is the city’s largest green space and one of the largest city parks in Latin America. There is plenty to do here…paths to walk or bike or people watch, museums, Niemeyer architecture, a lake, and more.
Museu Afro-Brasil: This is one of the nicest museums in the city, which is saying a lot because São Paulo has several excellent museums. It is housed in another Niemeyer designed building.
Latin America Memorial: The Memorial da América Latina is a complex of buildings designed by Niemeyer to honor the struggles of the Latin American people and provide a place where celebrations or public events can take place.
Ipiranga: Ipiranga was built in 1895 to preserve 400 years of Brazilian history and houses old maps, photographs, paintings, and furniture. It is located inside an impressive Neo-Classical palace with European-style gardens. Unfortunately, Ipiranga is located far away from the center but is accessible by bus and metro.
Source: http://thisismyhappiness.com/2013/04/03/things-to-do-in-sao-paulo-brazil/