Punk bands are musical groups that emerged in the mid-1970s, characterized by their fast tempos, short song lengths, and raw sound. They often express anti-establishment themes and a DIY (do-it-yourself) ethic, encouraging fans to create their own music and art. Notable punk bands include The Ramones, Sex Pistols, and The Clash. The punk genre has influenced various subcultures and music styles, leading to the development of genres like pop-punk and hardcore punk. Punk bands often perform in small venues and emphasize energetic live shows, fostering a sense of community among fans and musicians alike.