Samba de Gaffieira festivals and congresses

Samba de Gafieira (also just called Gafieira and often spelled as Gafiera) is a ballroom dance expression of Brazilian samba musical rhythm. The samba music played by a ballroom orchestra or the dancing hall where it is performed is also referred as gafieira.

Gafieira is usually an elegant partner dance, although in artistic performances it is not uncommon mixing solo steps of Samba no Pé.

Source:
http://en.wikipedia.org/wiki/Samba_de_gafieira