The child was allowed to play freely by him0herself in a roomful of toys.
One sometimes sees a roomful of elderly people seated in a semi-circle and almost immoveable and there is no doubt that there is colossal boredom.
One nurse in a roomful of nurses said that she was no longer so proud, when asked what she did, to reply that she was a nurse.
The new broadcasting studio is a large glass-walled room that can occupy a roomful of people.
The legendary bluesman and broadcaster transfixed a roomful of people with nothing but his voice and an acoustic guitar.
She can also bore an entire roomful of people into potatoes.
Just went to pieces; broke up a roomful of furniture in the hotel.
With them, you had a roomful of 65 guitars to get exactly the right sound.