#dance.party  a party of people assembled for dancing
  supertype:  #party.social_gathering  a group of people gathered together for pleasure; "she joined the party after dinner"
  subtype:  #ball.dance  a lavish formal dance; "she was the loveliest girl at the ball"
     subtype:  #prom__promenade  a formal dance held for a school class toward the end of the academic year
     subtype:  #cotilion__cotillion  a ball at which young ladies are presented to society
     subtype:  #masked_ball__masquerade_ball__fancy-dress_ball__fancydressball  a ball at which guests wear costumes and masks
  subtype:  #barn_dance  a party featuring country dancing
  subtype:  #record_hop__hop  an informal dance where popular music is played

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