There is a button in the lower right corner of the room to roll the dice.

If you want to enter the language lab that can be played quickly, you can open the language lab directly. This function is more like making friends and playing games than the language lab. Anyway, there are all kinds of singing language labs. You can choose a large number of people and click in to enter quickly. There is a button in the lower right corner of the room to roll the dice.