I saw them years ago opening for 311. I'd never heard of them before that night. 311 pulls a large crowd around here, so there were a few thousand people in the joint. Anyway, I was frickin' shocked when it seemed like EVERYONE was singing along to O.A.R. My longtime friend, Jill, and I were baffled. Haha. We both had never heard of them.
But I liked them. Still do. I wouldn't call them a jam band, but they sort of have that sound.