That's incorrect. Multiple generations often share a flat, related families might share a flat, but usually temporarily, unrelated families sharing a flat (comm

That's incorrect. Multiple generations often share a flat, related families might share a flat, but usually temporarily, unrelated families sharing a flat (communal flats) are rather rare now in big cities. Lack of dedicated bedrooms is a thing, though. Couches that fold out into beds are the norm in Russia.