Can lolita be cocktail attire?

I've been invited to a very exclusive club with a strict dress code. According to thier dress code I need a cocktail dress. While I know lolita is more formal, I'm not sure it would be considered appropriate cocktail attire. I was planning on making a dress this week anyway and was going to wear it to this event. However, my sister told me that it wouldn't be ok (she isn't stupid about lolita), so now I'm not sure if I should wear it.
Opinions?