Attending countless dance parties has gives you proficiency in the Performance skill and advantage on Performance skill checks that involve dancing.

When you find yourself in trouble, you can take a nibble of yourself to gain some health. On your turn, you can use a bonus action to regain hit points equal to one hit die, consuming that hit die. Starting at level 10, you can regain hit points equal to two hit dice. You can’t use this feature again until you finish a long rest.

Common

You like being around people and working on your dance moves at parties. Charisma score increases by 2 and Dexterity score increases by 1.