In ancient times, it refers to people who run around and rely on artists. Why can singers be collectively called?

Xiajiuliu touts, elegant tea, Shengweige, matchmaker, pawn, fashionable demon, thief, thief, prostitute platform, blow, circus, push, pool, back rub, repair, match, prostitute beating dog, selling oil, pedicure, shaving head, lifting vegetables, tailor, actor, prostitute, blow witch, prostitute. Gold (divination), monks, Taoism, chess, qinqi, medicine, geomantic omen, criticism, painter, monk, Taoism, chess, medicine, geomantic omen, criticism, painter, monk, Taoism and chess.