As mentioned before "Fantasy Quest" is an absolute riot...think human scavenger hunt.
"Match your Mate" is hit or miss for me...I don't like it when it gets too raunchy, but its usually all in good fun.
We love the trivia, 80s or 90s music trivia is fun, as is Disney trivia. It's usually done in one of the bars, and you can have a team of 4 or so.
Adult karoke,if that is your thing (SO NOT MINE).
Usually after any of the night time activities, there is the DJ and a dance party. Themes that we have seen were 70s (every ship has had this, so if you like the 70s and have anything themed, its worth bringing) and formal night.