I am so glad you asked this question. I am 21 and going on my first cruise March 15th and I had the same question. I am definitely bringing all of my club clothes with me, which usually consists of some tight fitting jeans and belly revealing top. I'm guessing since my cruise is around Spring Break time, many of the girls will be changing after dinner into more clubbin' attire. I love dressing in clubbin clothes and I'm going to do it, even if I AM out of place. If you've got it, flaunt it!