In dancing with various others at a social, there is a quite obvious difference in feel and look between those with full skills for the smooth dances, and those without.
The fully skilled dancers carry their body weight through a series of steps in constant motion - projecting it off the standing foot before their new moving foot has accomplished much in the way of motion. The feeling is one of grace and even-ness - their feet stop and go, but their bodies sustain the movement.
In contrast, the less skilled dancers endeavor to keep their weight stationary over their standing foot, until they have a new foot ready to receive it. They may well be comparatively unstable on their feet, and prefer to keep their weight not just on the foot but in the center of it. They begin each step by moving the foot rather than by moving the body. The result is that their dancing feels very uneven and choppy - their feet are in constant motion, but their bodies are not.