Apartment art is underground, usually experimental art exhibited in private spaces (such as apartments)
Apartment art is usually found in countries where there are strict governmental controls on the type of art that can be exhibited publically. It reflects a culture in which art is forced to hide away, so is an art of confinement, aerated by international contacts.
In China, between 1970 and the mid-1990s, there were few civic spaces for exhibiting and creating art, so artists turned their state-run apartments into exhibition spaces, holding salons, exhibitions and performances in secret.
A similar thing occurred in the former Eastern bloc during the 1970s and 1980s, where one-off events would be held in private spaces, usually an artist’s state-run apartment for which the publicity would be limited to word of mouth only.