Totally need help?

I am going on an overnight excursion and there is going to be a dance. But it's not formal, like the prom, or a school dance, it's like a dance where you can where dresses like this: http://www.hollisterco.ca/webapp/wcs/stores/servlet/product_11308_10201_341634_-1_12602_12552, over leggings. I was wondering, do you have any outfit ideas, specifically outfits with leggings... please help!