One plotline could be that Luke discovers an ancient dance form on a remote planet that has some sort of connection to the Force. He then spends time learning and perfecting this dance, which in turn enhances his understanding of the Force in a new way.
In some fanfiction, Luke might be a dancer in a traveling troupe that unknowingly gets caught up in a galactic conflict. His dancing skills then become a tool for him to communicate with different species and factions, as dance is a universal language in this fictional scenario. He uses his charm and grace on the dance floor to broker peace deals and form new alliances.
Perhaps Luke uses his dancing as a form of distraction during a battle. He could be on a mission where he needs to infiltrate an enemy base, and his dancing draws the attention of the guards, allowing his allies to slip by unnoticed. This would be a really creative and unique take on his character's abilities.