Does the "Dance The Magic" event effect crowds much?

[Pluto468]

I'm ironing out my July plans and just saw that Dance The Magic is happening July 6-9. Does this make the parks extra busy, or is there anything else to be aware of with a dance event going on?

I'm going either July 3-7 (Mon-Fri) or 5-9 (Wed-Sun), and I'm wondering if I should choose the days without the dance event.