The Eclipse Pavilion opened before 1903 and had 400 seats. ^[1]  The dance hall was open through 1927.^[2]

1. Polk’s Utah Gazetteer and Business Directory, 1903-1904
2. The Eclipse Pavilion was listed in Polk’s Utah Gazetteer and Business Directory from the 1903-1904 edition through the 1927-1928 edition.