Last year in Cadiz
DCL brought on a dance troupe to perform the evening's entertainment. They sort of over did it with the castanets. During the adult cabaret, the comedian did his imitation of the dance show by holding an aspirin bottle over the microphone and shaking - identical sound and quite funny. I hope the Magic will continue to have the adult shows late night; I hear they moved them to 7:45pm on the Dream.
...FYI: the adult cabaret is usually held at 10:15 or 10:45 in Rockin' Bar D on Deck 3. Quite often it will showcase the same comedian/magician/performer that presents a family show in the large Walt Disney Theatre. The material is usually still G-to-PG rated but not aimed at kids.
There are also games: scavenger hunt (but no leaving the room), Match Your Mate (very much like the Newlywed Game), shows by Cast Members...
What makes all this more fun is sitting in a section with new (and old) DIS friends.
Of course, there is no cover charge/entrance fee for this. You can order a drink or not and you won't get attitude from the waiters.