He lingered in the pleasure quarters and squandered the family fortune.
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From Song dynasty 孟元老's preface to 《东京梦华录》: 新声巧笑于柳陌花衢 - clever singing and laughter on willow lanes and flower streets, referring to the entertainment districts of the old capital.
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Highly literary euphemism. 柳 'willow' and 花 'flower' have long been associated with courtesans in Chinese poetry; 陌 and 衢 both mean 'street'.