Answer:
Thirty men and ladies two, gathered for a festive do; Dressed quite formal, black and white; soon movement turned to nasty fight.
What goes in the water red, and comes out black?
A little house full of meat, no door to go in and eat.
When I get closer my tail grows longer, but when I go away my tail leads the way.
What five-letter word becomes shorter when you add two more letters?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?