August 12, 1972, marks one of the most pivotal moments in Austin music history. That night, Willie Nelson climbed onto the stage at the fabled Armadillo World Headquarters for the very first time—but the band that made it all possible was the evening’s opener, Greezy Wheels. One of the capital city’s most beloved bands in the 1970s, the group had developed a reputation for packing the house, which helped the club introduce local crowds to new artists.