A few years ago I went to the Black Cat’s Run for Cover event (where a whole bunch of local musicians put together one-night-only cover bands for charity) and thoroughly enjoyed it. So I had wanted to go back ever since. But this past Saturday I was less impressed. It wasn’t bad, but I was tired, annoyed by the Bon Jovi cover band, and left before seeing the last two bands (one a Weezer cover band, the other doing the Bee Gees ). From what I saw, there were two main highlights — the Runaways cov…