Some offices double as guest rooms (or vice versa). This is an acceptable workaround if you seldom have guests, or if they only come for weekends, holidays, or your vacations—times when you are not working anyway.
Advantages: The same advantages of a converted bedroom, which is technically what it is.
Disadvantages: Disruption of work environment when guests come. Reduction of usable office space for bed, bureau, and other amenities for guests.
Next week, we’ll revisit some of the least desirable—but often necessary—options for situating a home office, and offer some suggestions for making these options work for those who have no choice.