This is our first 7 night cruise, and I'm just wondering if everyone participates in formal night? I'm a jeans/yoga pants and sweatshirt kinda girl, and I'm not big on dressing up or having to buy a dress that I'll never wear again. I have a few above the knee dresses that I've worn to Christmas parties and such - will that be okay? Or will I be out of place? I know we could always go somewhere else for dinner or get room service, but I love the MDR's and would hate to miss a night. Thanks for your help!