Answer:
I am a room that has a roof but no walls. What am I?
Crooked as a rainbow and slick as a plate ten thousand horses can't pull me straight.
I am a kind of coat that can only be put on when wet. What am I?
I can be cracked made told and played. What am I?
As I went over London Bridge I met my sister Jenny; I broke her neck and drank her blood and left her standing empty.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.