Generationals is one those bands whose music sounds immediately familiar but not quite pin-down-able. Perhaps it’s because of the New Orleans duo’s many colliding influences, including Brit pop, new wave, indie rock, and electro pop, which are combined to form incredibly palatable songs. Its third album, 2013’s Heza, sounds as if band members Ted Joyner and Grant Widmer took an extended vacation to the sun-dappled shores of California: Opener “Spinoza” sets a jangly, surfy guitar melody to an upbeat rhythm, while “Put a Light On” layered a sparkling melody over a handclaplike snare beat. Both tunes reflect the duo’s ability to create catchy melodies, which is why its music has been used extensively in commercials, on TV, and in movies. Its show on New Year’s Eve at Bottom of the Hill (1233 17th St., San Francisco), with The Frail and Nova Albion, will be one of the better rock choices of the evening.