Samba
Although samba exists throughout Brazil – especially in the states of Bahia, Maranhão, Minas Gerais, and São Paulo – in the form of various popular rhythms and dances that originated from the regional batuque of the eastern Brazilian state of Bahia, a music form from Cape Verde, samba is frequently identified as a musical expression of urban Rio de Janeiro, where it developed during the first years of the 20th century. Early styles of samba - and specifically samba de roda - are traced back to the Recôncavo region of Bahia during the 17th century, and the informal dancing following a candomblé ceremony. It was in Rio de Janeiro that the dance practiced by former slaves who migrated from Bahia came into contact with and incorporated other genres played in the city (such as the polka, the maxixe, the lundu, and the xote), acquiring a completely unique character and creating the "samba carioca urbana" (samba school) and "carnavalesco" (Carnaval school director). Samba schools are large organizations of up to 5,000 people which compete annually in the Carnival with thematic floats, elaborate costumes, and original music.
Rueda de Casino
Casino was developed in Havana, Cuba in the early 1950s. Casino traces its origin as a partner dance from Cuban Urban Son and Cuban Cha Cha Cha, fused with partner figures and turns adopted from the Cuban Mambo, Rumba Guaguancó and North American Jive. Casino is different than other types of Salsa dance styles because of its spontaneous use of the rich Afro-Cuban dance vocabulary within a Casino dance; a Casino dancer frequently improvises references to other dances, integrating movements, gestures and extended passages from the folkloric and popular heritage. This is particularly true of African descended Cubans. Such improvisations might include extracts of rumba, dances for African deities (Orishas), the older popular dances such as Cha Cha Cha and Danzón as well as anything the dancer may feel.