Since you are so kind, let us go and have some breakfast." Every one was assembled in the dining-room. 
Everyone had gathered in the dining room.
Everyone had gathered in the bathroom for dinner.
A group of people rode a roller coaster but it stalled.
A child swimming in the ocean.
a guy works on a plastic bottle
There is a lot of original music in the show.
A girl is playing a clarinet.
There is need for a system that will increase consumers' costs.