If more than one person rents a hotel room, does only the buyer have to show his ID, or does everyone have to?

I forgot my ID at home and so I'm kind of stuck. Does only the buyer (a friend of mine) have to show his ID, or do I need to also?If more than one person rents a hotel room, does only the buyer have to show his ID, or does everyone have to?
just the buyer.

kawasaki