Even if you don’t know Doc Pomus by name, you know the songs of one of the most brilliant songwriters of the early rock ‘n’ roll era, including “Lonely Avenue,” “Viva Las Vegas,” “This Magic Moment,” and the iconic “Save the Last Dance for Me.” Pomus helped Roomful land its first record deal, and tonight it pays tribute in the first set, and showcases its own signature jump-blues goodies in the second set.