12 LEFT SHOE ROOM. This room is piled high with left shoes, boots, sandals, slippers, and other manner of foot wear. A window shaped like a pentagon is in the east wall. In has no opening clasp or latch, so smashing it would probably be the easiest way through.
There is a 5% chance per round that a small hole will magically open in the ceiling and a shoe will come flying down to land on the pile. One of the shoes is the left side of a pair of glass slippers of striding and springing (like the boots but actually super-hard glass).