Sorry you had such an "interesting" journey, cookiesmom. This will be a fairly long story, although it won't come close to a record. I started out trying to keep it short, about 30,000 words all told, but the secondary characters kept agitating for more screen time. Look for 20+ chapters.
Tank, you're right about bands (or soloists) needing to play their own original material to make a big splash in the music scene. Elisabeth had part of the answer when she noted that it's easier to integrate new members into a group with known and popular tunes. Remember also that they were playing at a dance club, a place where they could slip in a few of their own tunes but where the public wants stuff they already know - and the public pays the bills. Plus, I didn't want to puzzle the gentle readers who wouldn't know what the Mountaintops' original material sounds like. For that matter I don't know what it sounds like.
Sorry, no punk. But Lois does have short hair, if only to keep it from getting caught under her bass' shoulder strap.
Elisabeth, you're right about not wanting stacks of music on stands. Pop and rock bands are all about feel and passion - to the listening public, anyway - and it's hard to show off while playing and reading a chord chart at the same time. Don't worry, they will have some original tunes, but unfortunately we won't get to hear them.
Next chapter up soon. Let me know what you think!