My friend and her husband love to ballroom dance. She wanted to know if there are cruises with a ballroom dance theme. I told her I didn't know the answer, but I knew exactly where to go to find out!
Another question she had is: are there any particular ships with lounges dedicated to ballroom dance music. From our experience, I know that certain lounges do have ballroom dance bands, but I have never paid attention to whether they play every night, if the dance floor is big enough for true ballroom dancing, etc.