If your invitation says “and Guest,” then yes, if not, we would prefer if it was just you.
Cocktail attire please, but of course we want you to be comfortable!
We would really prefer for it to just be you, we want you to have a night off and enjoy yourselves! However we do understand that isn’t always feasible, just let us know in advance if you will be having any little ones with you so we can make accommodations.