I happened to be at Diehard’s very first show ever last year at Union Hall. If I recall, I said that they had potential, but needed to have more confidence. It seems like the band may have found it. I’ve really been enjoying their song “Cool Kids” lately, which I strangely discovered in my iTunes while looking for Cloud Nothings’ “Hey Cool Kids.” They don’t have any sort of hipster ambitions, fashionably or musically, and there’s something refreshingly 90s alt-rock about their tunes. A very simple band, but one that’s a lot of fun to listen to. Check them out at Cake Shop on Thursday.