Not confusing

Sidebarring to NYE - going to a late dinner at a new restaurant & bar in Cleve which is serving a five course dinner with drinks...
I had been planning to wear a long sleeve black & gray sweater dress which comes to mid thigh and has subtle, sparkly sequins sown throughout, a pair of tights, dangling sparkly earrings and bold makeup and wavy hair (also planning to wear knee high boots only because I have a walking boot on the one leg so wearing anything with a heel makes for even more difficult walking 
Today I found the website which says cocktail attire...so now I am second guessing...
My girlfriend is coming in from out of town and wearing black skinny jeans, a black sparkly sheer top, sparkly earrings and either boots or heels.
I know things are open to interpretation these days and women can get away with more but any thoughts would be appreciated!