**Characteristics of Ballrooms:** – Ballroom is a large room for formal parties known as balls. – Traditionally held in private residences, many historic mansions and palaces have ballrooms. – Good ballrooms have hardwood or stone flooring. – Ballrooms can also refer to nightclubs designed for dancing events. – They are typically designed with high ceilings to accommodate dancing. **List of Hardwood US Floor Ballrooms:** – Fullerton Ballroom in Fullerton, California, established in 1927 with 2,145 sq. ft. – Lakeside Ballroom in Guttenberg, Iowa, established in 1927 (specific size not provided). – Oak Ballroom in Schuyler, Nebraska, established in 1929 (specific size not provided). – Cains Ballroom in Tulsa, Oklahoma, established in 1924 with 11,000 sq. ft. – Diamond Ballroom in Oklahoma City, Oklahoma, established in 1964 (specific size not provided). **Notable Ballrooms:** – Aragon Ballroom in Santa Monica, California. – Clärchens Ballroom in Berlin, Germany. **References:** – Fullerton Ballroom is 2,145 sq. ft. (established in 1927). – Cains Ballroom is 11,000 sq. ft. (established in 1924). – Information on Lakeside Ballroom and Oak Ballroom sizes is unavailable. – Various sources provide additional data on different ballrooms. – Specific measurements and details are available for some ballrooms. **Further Reading:** – ‘Millennium Maple – Glorious, Historic, Legendary, Treasured Ballroom Dance Floor’ by Robert Meyer. **External Links:** – Texas Dance Hall Preservation Inc.