The slow dance animation really needs sorting out . If i try and have my sims do it in a nightclub with a dj they almost immediately stop dancing to go stand and watch the dj or else they stop to wat...
I'd have loved it if they'd have re-made the TS2 slow dance and interactions in TS4. I use a mod right now that adds the TS3 slow dance to the game, but I miss the TS2 one.