Sao Paulo Visit July - assistance/guides (São Paulo)

Hi All, I am in Sao Paulo on businessfor 2 weeks in July Protected content and will remain a few days probably to the 22nd (holiday) to get afeel for the city. If anyone has time to show me around a little one day or even just supply some tips on what MUST sees there are in the city it would be appreciated. Also any recommendations on nice hotels, relatively central for a newcomer. Many thanks !!!!!