The bumper sticker read, “I’d rather be at a Tommy Castro Show,” and the crowd that filled Folsom’s Powerhouse Pub Saturday night agreed. Ben and Robin Penn chose Castro over the lighted boat parade, and others chose the show over competing concerts and Sacramento’s Second Saturday events, braving the cold and the Santa Pub Crawlers to hear Castro and his band. The band that performed Saturday night is not the same lineup fans will see in 2012, when Randy McDonald will replace Scot Sutherland on bass, Keith Crossan will take his sax skills elsewhere, as will Tom Poole and his horn and Tony Stead and his keyboards. Byron Cage will remain at drums. Castro fans were clearly not disappointe