South Korea (Score 4, Interesting)

South Korea has always been huge into these kinds of games. In fact, they got 2 of their own DDR arcade machines (DDR 3rd Mix Korean version 1 and version 2) complete with Korean music implemented into it. Incidentally, the US almost got it's own DDR arcade version, too (DDR USA), except the government wanted to lable DDR arcade machines as juke boxes, which would create all sorts of liscencing entanglements which would make these $12,000 machines even more expensive for arcade owners. Some DDR USA machines can still be found around the country, although very rare, leftover from field testing.