If i were you, i'd do it until i get an IOI such as smiling, giggling, or complete focus on you. I wouldn't give her a whole performance cause it'd take too long and might seem like you actually are showing off so here's what i'd do if i was you:
Me:**After her finding out i can dance** Show me one of your dance moves and i'll show you one of mine!
Her: **Anything, whether she shows you or not**
Me: **If she doesn't** Awwh i thought you'd be more entertaining! Anyways, heres mine, think you can handle it? **Dance**
Her: **is amazed, etc**
Me: **Stops after a few dance moves/10 seconds** Anyways, that's all you get to see, it'll cost you to see more **Wink or make it obvious you're teasing**
That's probably what i'd do but i don't know how to dance.
Have fun man, take care!
