Most of the Guardians aren't much for dancing. Rocket, not usually. Drax, definitely not. Mantis tries but she's not very good, and Quill... well, Quill is responsible for most of how Groot dances, but it's fairly obvious that no one ever taught him how. The Terran dances however he feels is right in the moment, and Groot's adopted that philosophy for his own entertainment.

Learning actual steps of a dance is new and exciting. Two people dancing the same way? Crazy! But he's all for it, making little noises of amusement or embarrassment when he makes a mistake, bolstered by the way she doesn't seem to mind.

He doesn't pay much attention to her Ghost, well used to little machines and automatons out and about. On the sidelines, though, Rocket is eyeing Ghost and making sure the little bot isn't a threat. Probably as harmless as a spycam, but you never know.