So there was a birthday party in the Room of Requirement, therefore it could not be used for other purposes at the moment. It took Ari a long time to come up with another place where she and Jory could practice the ballroom dancing mentioned on the DADA assignment list. Finally, she found just the spot: a classroom on the ground floor, currently deserted. The girl scribbled a note quickly and sent it via owl to Jory, telling him to meet her there as soon as he could. The Gryffindor really missed her Hufflepuff friend.