Examples from literature

• At back double doors open into a corridor which leads to the ballroom. 
• But he is quite a young gentleman, and has doubtless had more experience in ballrooms than in bombarded cities. 
• But there was also dancing in the ballroom. 
• Round and round the ballroom went the seventeen struggling little couples of the Friday Afternoon Dancing Class. 
• Soon dinner was over, and the guests began to stray by twos and threes to the ballroom. 
• The walls and the ceiling of the great ballroom were of thick but transparent glass.