Parque do Povo is a pleasant place to take a breather. Enjoy a picnic, wander around the grounds or just lie on the grass and close your eyes for a while.
You'll have no end of sightseeing choices in Itaim Bibi. Parque do Povo is a good place to kick off here, but there are numerous other fine attractions to check out. Paulista Museum, Municipal Theatre of São Paulo, and Ibirapuera Park are not far from the recreation and green space and will fill in your day nicely.