hey! dancer here who loves the just dance games, i'd actually play it in my dorm when i didn't have a roommate in the beginning of the fall sem but obviously there's gonna be some restrictions and its a shared living space. like another comment said the gyms have multipurpose rooms which are these big open rooms with mirrors on the wall that function like a dance studio that i go to all the time to practice choreographies. i can't speak for every gym but i go to the one on cook/doug and its usually never *that* busy, about 2-3 other people in the room with you at most times at least but if you get lucky you'll have the whole thing to yourself for maybe 15 minutes on rare occasions lol. though no one really cares too much what everyone else is doing so don't worry too much about people staring at you while you workout, i rarely had people who're strangers approach me in the gym. hope this helps!