Ballroom (noun)

1. A large room in a building used for dancing.
2. A large room in a hotel or conference center for holding social events such as parties, dinners, or weddings.

Origin:

Early 17th century: from ball + room.

Examples:

1. She is a professional dancer who specializes in ballroom styles.
2. They held their wedding reception in the ballroom of a grand hotel.
3. The annual ball was held in the spacious ballroom of the city's largest hotel.
4. The ballroom was filled with guests dressed in their finest attire.
5. The ballroom was decorated with crystal chandeliers and elegant floral arrangements.