Sentence:  At the Municipal Pier, for example, an investigator learned that when Negro couples went on the dancing pavilion floor the <WSD>floor manager</WSD> informed them that they were not dancing properly and took them to one side to acquaint them with the approved style of dancing; no matter how well they danced, they were to be prevented from going on the floor by the manager's judgment of their dancing. 
Meaning of the word marked with <WSD> tags:  One who manages the floor of a (dance), (club), or other gathering of people.