I don't know about "opening" acts...but this made me think of a club we had in our small town in Michigan called The Cobra. This was in the late 60's. I never realized until a lot later that we had so many groups there that ended up making it really big! We had Alice Cooper, Ted Nugent, The Zombies, Jefferson Airplanes, Santana...and i know many more! I get mad at myself for not paying attention!!!!! I was 15-17 yrs old and just cared about going out there, dancing and having fun...didn't pay attention to the bands really. What a dummy! Lol!