Dirty Blonde is one of those bands that many have not heard of but many will love once they’ve heard them. Sultry singer Cheryl Aruda fronts this hard-driving, non-stop rhythm machine. Playing at Palmer’s Restaurant in Andover, Massachusetts last Saturday night, Dirty Blonde made a believer out of everybody who had not seen them before. If this band didn’t have to stop playing at midnight they would have probably kept going until breakfast. Aruda’s own song, played near the end of the night,