When all else is lost, plant a lozenge

Escaping the dance because one is left footed in terms of agility and/or dexterity on the dance floor is not a real reason to avoid the situation.

You can move about, flailing your limbs out of sync with all of the beats and be confident that some people will judge you as a poor dancer. The nice ones, however, will see that with abandon you make your presence known and they would be encouraged to will themselves onto the floor to move about haphazardly themselves.

There is no need to impress on the dance floor; at least, not under most circumstances. Feel the music and move to it as you will.