Awakening not in their own rooms, we find the houses in one house...
The sound of thundering footsteps echo through the run-down house, the owner of them not caring how the stairs protested loudly under his boyish weight. Soon Harry found himself in the entrance hall of the large house, a group of people scattered about that room and the next; their heads snapped up to look at him.
"The boy wonder finally decided to join us, I see..." Severus Snape drawled boredly from the chair he sat in. A soft amount of dust from the old chair had settled on his shoulder, bright against the black of his usual robes.
"What are we doing here?" Draco Malfoy complained from his leaning post.
"Now that everyone is awake..." The wispy form of McGonagall appeared, setting a globe of blue light on the table. The second it touched the worn wood, she disappeared.
"What the-" Fred started.
"-Hell?" George continued.
"Well it seems my third eye was right again...danger..." Professor Sybil Trelawny wrung her bony hands as she eyed the globe as if it were her death.
"Hermione!" Ron's voice cried out from the adjoining kitchen.
"Hermione, who had been looking over the books on a far wall, raced into the kitchen. "What is it, Ron? What's wrong?"
"No...no..." Ron muttered from the floor, pointing at the fridge in horror. "...No food..."
"Everybody, please. Come back here so we can see what this is all about." A very tired Remus Lupin called to them, walking closer to the table and picking up the sphere.
The mismatched group of witches and wizards gathered around him in a circle, watching. The orb glowed and lifted from Lupins hand of its own accord, becoming a wispy form of none other than Albus Dumbledore.
"House pride has been getting in the way of school unity at Hogwarts. So I took the liberty of volunteering a few of my teachers and students to help restore this old, neglected muggle building." The image of Dumbledore continued, the unanimous groan of displeasure unheard, "You'll all be staying here five or six days; your belonging have been placed in rooms already, and you'll find all the cleaning supplies you should need in the nook underneath the stairs. The muggles in this town believe this building to be haunted," Dumbledore chuckled, "So they'll be keeping their distance from here. Therefore, the use of your magic should be fine as long as we all remember to know the limit. And no worries, everyone; it's only a silly muggle superstition. Besides, we all know ghosts do us no real harm..."
"Oh goody!" A light voice came from the blonde head emerging from the coat closet, crawling on her knees, large green and pink glasses sparkling. "That will give me more than enough time to look around for the pink-toed bear fae!"
The Dumbledore illusion winked, as if knowingly of Lunas comment, and before disapating into the musty air, "Now that's the spirit."