Conversation so far:
Was atomic kitten a musical band?
In April 2003, the album Atomic Kitten was released in the United States, which consisted of tracks from their first two albums.
how  many members were in the band?
CANNOTANSWER.
Why did Hamilton leave the group?
The Big Reunion that Hamilton had quit the group under the pressure of being a new mom and touring.

Question: is ladies night the name of a song or an album that they did?
Self-contained rewrite: is ladies night the name of a song or an album that  atomic kitten did?