The Dan Tian in Chinese, perhaps more familiar under the name of Hara, close to the center of gravity, has all its importance in Tai Chi and in the tango also.
The energy comes from the feet, is directed by the hips and reaches the fingertips, Tai Chi is said.
Feeling the hips and ankles loose, as well as a more present center will help to anchor the body in the ground and allow for more fluidity.