A couple questions about what to wear... I'm the type of person who is usually cold. When we go to a restaurant during the summer, I always bring a sweater with me in case the air-conditioning is too cold. What is the air-conditioning like in the restaurants on the ship? If I wear a tank top or sleeveless dress, would I be too cold? We are going on a 7-night Western cruise in May. Also, I know they have the Mexicali... theme for one night. What do people usually wear for that?