commissionaire
noun [ C ] mainly UK uk/kəˌmɪʃ.ənˈeər/ us/kəˌmɪʃ.ənˈer/
（宾馆、剧院等门口穿制服的）看门人，门童
a person wearing a uniform who stands at the entrance of a hotel, theatre, etc. and whose job is to open the door for guests and generally be helpful to them when they arrive