Does anyone plan these things or are they picked out of a hat?

You think these names just come out of a hat?

Do not think that name was picked out of a hat.

It's like the groups were picked out of a hat!

These things don't choose their names out of a hat.

You could pick a better era out of a hat.

"You can pick two stories out of a hat, and they'll put them together."

As I sat all in a maze he came out of his hat and began again.

But "somebody has to pull more than 50 people out of their hat to say that they know better."

Some people seem to choose them out of a hat, whatever takes their fancy.