filtered against baddies;
I make sure Xander doesn't eat all the food. Well, except the special diets, he doesn't tend to go after the blood or raw meat. Everyone's full stomach's are my references!
But, to be serious and professional, Internal Management covers the hotel as a place of residence and business, from supplies to upkeep to the non-fighting, non-researching, non-boss side of Angel Investigations like payroll, billing, investments, supplies order/repair, the building next door, things like that. Something like a cross between hotel management and half of an office manager, I'd guess?, as the research, demon database, client files and so forth are the wonderful Fred's territory. I also patrol part-time!
I just put the current room list and system printout of everyone who has access to the hotel on the desk in the office.