It had the main entrance from the street, with steel security screens to protect the big display windows. There was also a back entrance.
On the day before Halloween, as Cindy was visiting her friend, all washing machines began a spin cycle on their own, resulting in an explosion of water and wet clothes, when a interdimensional bridge to an alien planet opened and Cerebravores arrived on Earth.
The next day, on Halloween, the Tenth Doctor's investigations of the source of psychic activity brought him into the laundromat, where he was discovered by Gabby. Later that day he returned there with Gabby and travelled to the world of Cerebravores over the bridge. While he was there, the laundromat was accosted by a mob of humans controlled by Cerebravores, including Gabby's friend Cindy. (COMIC: Revolutions of Terror)