Complex sentence: All the boudoirs of that generation were garnished with divans; they even spread to coffee-houses, which were sometimes known as divans or Turkish divans; and a "cigar divan" remains a familiar expression.
Split into simpler sentences: All the boudoirs of that generation were garnished with divans. They even spread to coffee-houses, which were sometimes known as divans or Turkish divans, and a "cigar divan" remains a familiar expression.