Dressing for New York date night dilemma

Today's blog is brought to you by my impending panic over what to wear whilst in New York. Now obviously I'm no celebrity (oh how different and fabulous my wardrobe could be) but needless to say I don't plan on dressing like a tourist whilst I'm there. My day time outfits are more or less sorted but evenings out are what I'm struggling with. We're planning on two date nights one with cocktails and a posh dinner and one with a broadway show and cocktails so what do I wear! Everything I've ready is so conflicting some say wear black some say don't do that locals will laugh so what do I do? What would you or have you worn if u were or have been to New York?