The Doctor should know by now, Jack always wanted more, and wasn't afraid to push for it! He laughed out loud as the Doctor indulged him and started to jive, his heart light and happy. Given that this version of the Doctor was slighter than him and less accustomed to dancing, he took the lead this time, encouraging the Doctor to let rip with some swings under his arm and twirling him in and out again, before reeling him in for some fast, swaying pivots.
When the tune came to an end, he stayed there, swaying gently with him for a long, happy moment before finally relenting and untangling their arms, treating him to a light, uncomplicated smile. "Thank you," he said warmly, linking their fingers together to lead the Doctor off the dance floor once more.