Complex sentence: The group was the house band at the Vulcan Gas Co., the late 1960s Austin club and the band is credited with a significant role in the founding of the Armadillo World Headquarters, and was the first band to perform there.
Split into simpler sentences: The group was the house band at the Vulcan Gas Co., a late 1960s Austin nightclub. The band is credited with a significant role in the founding of the Armadillo World Headquarters, and was the first band to perform there.