The bar in the Hog's Head is small and extraordinarily dirty and strewn with sawdust, with the windows nearly opaque and the floor all but invisible beneath the dirt. There is an "ancient wooden till" behind the bar that serves as cash register, and the entire room smells strongly of "something that might have been goats." Even the rags behind the bar seem filthy; at one point, as Aberforth continues to wipe a glass, Harry notes that it seems to be getting dirtier.
Behind the bar is a "rickety wooden staircase" leading up to a sitting room, most likely an open area between the guest rooms, with a fireplace and a curtained window looking down at the street. The guest rooms themselves are located above the bar, and like the bar itself are not noted for being especially clean. Sybill Trelawney, for example, warns Harry against bedbugs.
Above the fireplace in the upstairs sitting room is a portrait of Ariana Dumbledore. Through this portrait is a secret passage, leading into the Room of Requirement in Hogwarts. This passage "opened up" when Neville Longbottom began living in the room in the spring of 1998, though we have no way to know whether the portrait might have led to another part of Hogwarts prior to that time.
