Am going on a rare 'proper' night out soon for a party in town. A meal first then to a bar for drinking/dancing. I have a dress and heels sorted but don't know what I need to wear over the top when getting to the venues. Denim jacket- too casual? Some kind of blazer? Or am I over thinking this completely and no one will be looking at my coat!! Please help! By the way I am early 40s, big-boobed size 12 if it matters.