For me the first time slow dancing worked very well and it was longer than I expected. I made them do it in the lounge that shipped with new pack in Tartosa. The stereo was on the rooftop. The second time they danced twice in the room and it was short as hell. :D They did flirt while dancing and kissing interaction and it did go well, but the dance itself lasted maybe six seconds. Way too short and the timing should be always the same no matter the place. Maybe the toddler daughter of my sim interrupted them, but I’m not so sure. She was close by and queued action just after they finished.