How how you gonna match the colors that the squares on the floor cast, to the footage of the dancing people ? If a guy is dancing on a green light square he should have some green light casting on him (at least the pants) If not it gonna look really fake.
If you didn’t shoot yet, you better shoot each people separately then you can apply some colored gradient on them to simulate the light that the floor casts.
Maybe my comment is useless cause you already planned to do that or you have a better way to do it, but i’m curious to know how you gonna do that part 🙂
And one more, what camera are you using for the shooting ?