A Bed and Breakfast (often referred to as a B&B) is a type of boarding house typically operating out of a large single family residence. Guests are accommodated at night in private bedrooms and breakfast is served in the morning - either in the bedroom or, more commonly, in a dining room or the host's kitchen. Bathrooms can be private or shared (with other guests or with the family in smaller establishments) or en-suite (where the ablutions are directly accessed from the guest's bedroom). B&Bs may be operated either as a primary occupation or as a secondary source of income. Staff often consists of the house's owners and members of their family who live there. Guests are usually expected to pay for their stay upon arrival and leave before noon (or earlier) on the day of departure. A big advantage of this type of hosted accommodation is the local knowledge of the host(s).