Zouk
Zouk is a progression of Lambada and is now one of Brazil's popular ballroom dances.
Brazilian Zouk is a connection-based dance with 3 main components: body movement, head movement, and general pattern-work. It's easily personalized, sensual, and has a wave-like flow.
To compare it with other styles you might be familiar with, Zouk is most similar to West Coast regarding it's "backwards intention" and also Bolero for its smoothness and "reaching", or projecting, slow steps.
The Zouk community in Chicago is a very warm welcoming community; and the dance itself can be physically therapeutic if executed with the proper technique.