How to dance without moving your legs and hands?

With just your head.
(Think Stevie Wonder).

Shift your shoulders and head? We have people in wheelchairs on dance floors here.

You got me. When I dance everything is motivated.

Belly dancing and smooth head movements can help. Start off slow, practicing movements one at a time in a mirror until you feel like its alright. If you get the flow indented into your brain, eventually you’ll get what you’re comfortable doing without a mirror