group of people dancing on dance floor 
The dance floor is wood
a wooden dance floor
Interior shot, showing dance floor and patrons. 
approximately, thirty-something, to fifty-something, dance-floor users.  
Shiny, yellow dance floor.
Retro dance scene, with ring of happy onlookers and dancing guy.
Three, visible women, and four other people, all well-dressed, enjoying themselves.
eight people on the dance floor
dance floor people are on
several people are dancing on the dance floor in a room