Talk to Sally, look at box with empty cards, talk to Sally again to tell her of Maria Mercurial outside, watch her leave and take a blank keycard.
Go south then west to dining room, at ladder dip card into solvent or melt it on stove (optionally take kerosene can; can be put on stove to lure cook out).
Go north then west, tell Christopher you got mugged in the barrens, take a blank keycard from the shelves, go to computer.
Decking 6 to print an inner sanctum keycard, otherwise see picture frame slightly north, then computer, admin recovery "Shorty", authorize keycard "Monica Sachnoff" (SEA134-647).
Move to flat desk computer to see that Monica lives in Dorm B. Go slightly east to waste baskets, discover that Monica has a little brother "Brian" (Baby Bree). Now go to to first computer again and enter all data to get a "home access card".
Go south into restricted area. East: human/elf female uniform, inner sanctum keycard in locker (force open). West: human male uniform. South, then east: human female uniform. West: Box with Shane's (Cherry Bomb's man) belongings, human male uniform (note: after letting team in, uniforms are unavailable).
Go south to kitchen, then further to storage room, take lard and chloroform. Further east, lockers have dwarf janitor uniform and keycard, troll and ork janitor uniforms, human/elf janitor uniform.
In janitor uniform, talk to Willy to lure him into storage room, then use chloroform to take uniform and inner sanctum card.
Back to kitchen, tell cook that Sally asked for her.
Apply grease to vending machine, then push. Let the team in, take shortcut behind vending machine (preferable) or go to turret-guarded entrance pretending to be a rather unfriendly Julie.