PoohBear....I agree with luv2cruise99....dressy black slacks paired with a dressy top, snazzy shoes and nice jewelry will be perfectly fine....especially when you're sitting next to someone in jeans, T shirt and baseball hat (yes, even on formal nights). I love seeing everyone all dressed up on formal night but I am more comfortable in slacks. My dressy, silky, black slacks are so easy to pack, with two dressy tops, and one pair of black, dressy, shoes. Less to pack and very appropriate attire for the formal nights. Also, I don't want to spill my dirty martinis or chocolate melting cake on a formal dress, ha!