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Jyutping caa4 mou5
Pinyin chá wǔ

Definitions (粵典–words.hk)
  1. 名詞
    夜總會​、​舞廳​早段​營業​時間​,​上午​11​:​00​至​夜晚​8​:​00​,​之​後​係​「​晚舞​」​時段
    The early business hour of night club, from 11:00am to 8:00pm, after that is the "night dance" session; literally, tea dance