Smustle
The Smustle was a dance introduced in Nightlife. It contained many jumps, claps, points, twisting and turning.
Joining the Smustle
When a Sim nearby is dancing the Smustle, the player can click on them and they option 'Join Smustle' should appear.
'Let's do the Smustle'
The 'Let's do the Smustle' action is very easy to come by. The 'Let's do the Smustle' option is usually under the 'Join Smustle' action.
The 'Smustle' action is only available when music is playing near by.