This is the seventh room in the game to be divided into two sections. Ki and Gil will enter the bottom section through either the door at bottom-left of it (if they had came from Museum), or the one at bottom-right of it (if they had came from Library) - which contains total of one Sorcerer, four Golden Mirror Knights, four Black Captain Knights (which have yellow visors), and four Hyper Knights. The key up at the top-left of the bottom section opens the door at the top-left of the bottom section, that key at the top-right of the bottom section opens the door at the top-right of the bottom section, that key at the bottom-left of the bottom section opens that aforementioned door at the bottom-left of the bottom section, the key at bottom of the bottom section opens the door at the top of the bottom section, and that key at the bottom-right of the bottom section opens the aforementioned door at the bottom-right of the bottom section. The doors at the top-left and top-right of the bottom section lead to the top section (Room Pass: still Q39 - same as Druaga's Grave), the aforementioned door at the bottom-left of the bottom section leads back to Museum (Room Pass: 2C2), the door at the top of the bottom section leads to Attendant's Room (Room Pass: 2F9 - same as Jewely Storage), and that aforementioned door at the bottom-right of the bottom section leads back to Library (Room Pass: Q32). You should remember the first and third of these Room Passes for later in the game...
If Ki and Gil went through either the door at the top-left of the bottom section, or the one at the top-right of the bottom section, they will re-enter through either the first or third door at the top of the top section, which contains no enemies at all. The key at the left of the top section opens up that aforementioned first door at the top of the top section, the key at the centre of the top section opens the second door at the top of the top section, and the key at the right of the top section opens the aforementioned third door at the top of the top section. The aforementioned first and third doors at the top of the top section both lead back to the bottom section (Room Pass: still Q39), while the second door at the top of the top section, like the one at the bottom of Lounge, leads to Queen's Room (Room Pass: 7CY, same as Banquet Area). You should also remember the second of these Room Passes for later in the game, as it may be of use to you.
