This is a samba school in Olinda. Samba School Old Black, Escola de Samba Preto Velho. The colors of this samba school are green and pink like the famous Mangueira, samba school at Rio de Janeiro.
wikipedia: A samba school (Portuguese: Escola de samba) is a club or dancing school. They practice and often perform in huge square-compounds ("quadras de samba") devoted to practicing and exhibiting samba, an African-Brazilian dance. The schools are traditionally associated with a particular neighborhood, often shanty towns ("favela"). Throughout the year the samba schools have various happenings and events, most important of which are rehearsals for the main event which is the yearly carnival.