Atari is going to bring the Namco Bandai-developed Family Trainer to Europe this September.
This is the Wii-exclusive title that comes with its own dance mat for "total body gameplay", according to this press release. It's called Active Life: Athletic World in the US.
Family Trainer has you doing all sorts of things like rafting on the river, racing mine carts, jumping over logs or just skipping ropes. You can do it on your own because you'd rather no one watch, or with and against friends because you are drunk and have given up caring. All on one mat.
There are lots of colourful locations to look silly in, such as haunted houses complete with zombies, or fairytale worlds where you can ride on toys in the clouds.