Trying to fit the Mavericks into a single musical category has always been a waste of time. Right when you’re about to settle on a neat label like country or pop or blues, the Miami natives show up singing gospel or rockabilly or lounge. Trampoline, the quintet’s fifth album, is by far the band’s most eclectic mix to date. Pick any of the album’s 13 tracks, and chances are the tune will sound nothing like its neighbors. Opener “Dance the Night Away,” which features hopalong beat, mariachi brass, and singer Raul Malo’s Orbisonesque tenor, gives way to “Tell Me Why,” a dead-of-night burner with a smoldering guitar part that would make B.B. King proud. With its brushed snare, tickled ivories, and syrupy vocals, “Fool #1” would fit in fine at any Sheraton cocktail hour, while the only place suitable for “Save a Prayer” would be a swampy Southern church housing hundreds of sweaty faces shouting salvation to the rafters. Sometimes the Mavericks’ attempts at being diverse hinder the flow of an otherwise enjoyable listen: “I Hope You Want Me Too” provides a samba groove awkwardly layered with wah-wah guitar, electric guitar, and funked-up bass, and “Dolores,” an oily vaudeville rag, belongs in the hands of a novelty act like the Squirrel Nut Zippers. Despite having a helluva lot of fun on Trampoline, the Mavericks would be better off focusing on, say, three or four musical genres. But knowing these guys, album No. 6 could very well be a healthy mix of electronica, chant, and calypso.