Guest House is a non-profit, charitable organization dedicated to the treatment of Catholic priests, deacons, brothers, seminarians (and - since 1994 - women religious) who suffer from alcoholism, other chemical dependencies and other addictions involving food and gambling. Opened in 1956 in Lake Orion, Michigan, Guest House is the oldest, continuously operating treatment center of its kind anywhere.

A guest house (also guesthouse) is a kind of lodging. In some parts of the world a guest house is similar to a hostel, bed and breakfast, or inn where in other parts of the world (such as for example the Caribbean), guest houses are a type of inexpensive hotel-like lodging. In still others, it is a private home which has been converted for the exclusive use of guest accommodation. The owner usually lives in an entirely separate area within the property and the guest house may serve as a form of lodging business. This type of accommodation presents some major benefits such as:

• Personalized attention
• Healthy and homemade food
• Quietness
• Inexpensiveness
• Modern design