There’s nothing like some good ol’ nostalgia — even if most of us weren’t around for the music that largely inspires NYC area bands Fletcher C. Johnson and Hector’s Pets (pictured). the former takes cues from rock-pop bands of yesteryear, inundating listeners with prominent, simple guitars and airy vocals to match. Hector’s Pets, too, carry a vintage sound, albeit one that is faster and harsher. Quick guitar riffs, driving drums and hard lead vocals supplanted with cooing back ups will be sure to get feet tapping. See them both at Union Pool tomorrow night (05.21).