What are the roles of medical staff?

What is the children's book that involved a hotel or school that required its staff to cover multiple roles, wearing different costumes?

• Recently I remembered a book from my childhood about a hotel, or maybe school, that didn't have enough staff and so a few people had to cover all the roles, wearing different costumes etc. Does anyone know this book? Can you tell me what it's called?

• Answer:

  I don't know the answer, but you might have some luck on the Abebooks site, as they have a section called Booksleuth.  You can post a description of the book as you have done here, and booklovers worldwide view the page and provide answers.  Good luck.