So, ok, I won’t call “The Heart of Rock and Roll” poppy. If not poppy, it’s certainly predictable, a dose of 1980s nostalgia with a by-the-numbers plot that would not be out of place in a conventional 1950s musical comedy. But for what it is, the show has its moments. Cott gives another reliable central performance, surrounded by stand-out supporting players. Lorin Latarro’s choreography rocks, and hops, and sometimes completely flips (there are acrobatic dancers in the ensemble.) In between the catchy tunes, eye-rolling contrivance battles it out with cleverness; sometimes, clever wins.