Punk houses are residences comprising of those who identify with the punk sub-culture, and are sometimes squatted.  These houses have many features of communes, often serving as crash-pads for others, while residents often share expenses such as food and live in relatively close quarters with each other.  Many punk house have specific ideologies, often anarchism, straight-edge, or vegan.  Photographer Abby Banks, author of Punk House: Interiors in Anarchy noted the influence of the vegan punk cookbook Soy, Not ‘Oi!, authored by residents of the Tempe, Arizona Hippycore Krew punk house — the house also served as host to punk bands such as Green Day.  Punk houses often serve as hubs for the local punk scene by providing DIY performance space for bands and concerts.