A Guesthouse, often referred to as a Guest House, is a lodging typically operated out of a large single family residence where guests can be accommodated at night in private bedrooms (which may or may not be equipped with private baths) and where breakfast, sometimes Continental and sometimes the full English variety, is served in the morning.
In Ireland, most B&Bs serve a traditional Irish breakfast as a point of pride. The business may be operated either as a primary occupation or as a secondary source of income, and the staff often consists of the house's owner(s) and members of their family who live there.
Because most Guesthouses are small, rarely with room for more than about 10-15 guests, it is advisable for anyone wanting to stay at a bed and breakfast to make reservations well in advance of their travel date. Consultation with a qualified travel agent knowledgeable in this type of accommodation is recommended; many B&Bs belong to associations, have a web presence, and are described in various books and travel guides.
Modern Guest Houses often consciously seek to recall earlier days; they are frequently established in attractive older houses that have been renovated and filled with antique furniture. In some cases an existing inn will relabel itself as a "Guesthouse" to improve business.