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Sleaze rock is a raw, streetwise branch of glam-influenced hard rock that mixes blues-based riffs, punk energy, and a swaggering, decadent attitude. It favors crunchy guitar tones, raspy vocals, and big gang-chorus hooks over glossy pop sheen. Emerging from the Sunset Strip in Los Angeles, it differentiated itself from radio-friendly glam metal by sounding dirtier, groovier, and more dangerous—closer to barroom boogie and punk grit than to polished arena pop. Lyrically it leans into hedonism, nightlife, street romance, and excess, while visually embracing leather, denim, scuffed boots, and a rebellious persona.

Hard rock is a loud, riff-driven style of rock music built around heavily amplified electric guitars, a powerful rhythm section, and assertive vocals. Songs typically center on memorable, blues-based guitar riffs, strong backbeats, and energetic, often shouted or belted choruses. The genre emphasizes power, groove, and visceral impact over intricate harmony or extended improvisation. Distortion, power chords, pentatonic melodies, and call‑and‑response between vocals and guitar are core traits, while lyrical themes often explore rebellion, lust, swagger, escape, and cathartic release.

Rock is a broad family of popular music centered on amplified instruments, a strong backbeat, and song forms that foreground riffs, choruses, and anthemic hooks. Emerging from mid‑20th‑century American styles like rhythm & blues, country, and gospel-inflected rock and roll, rock quickly expanded in scope—absorbing folk, blues, and psychedelic ideas—while shaping global youth culture. Core sonic markers include electric guitar (often overdriven), electric bass, drum kit emphasizing beats 2 and 4, and emotive lead vocals. Rock songs commonly use verse–chorus structures, blues-derived harmony, and memorable melodic motifs, ranging from intimate ballads to high‑energy, stadium‑sized performances.