She wasn't watching the singer. She wasn't watching the guitarist. She was watching Leo. And she was holding a drumstick.
But the drumstick is also a metaphor for any tool we use to create rhythm in our lives. That could be a whisk (which beats eggs – "bate"), a paintbrush, or even a pen. The drumstick represents precision through velocity . Enjoy Flirt Play Drumstick Bate
The physical act of "bating" (striking) a drum head releases endorphins and reduces cortisol. She wasn't watching the singer