It's four in the morning. Outside, the night is quiet, and most people have been asleep for hours. Inside the club it's a different story. It could be a club in Los Angeles or London, Tel Aviv or Shanghai, and its walls are vibrating. The thumping techno beat of the music is that loud, and it is driving and energizing the dancers in the club. Arms flail, heads bounce up and down, and somebody is waving a pair of green neon glow sticks in the air. They've been dancing like this for hours, and they don't plan to quit any time soon. When they finally leave the club, the sun will be up. They'll be sweaty and exhausted, but also exhilarated, and happy. It's a rave.
Simply defined, a rave is a party — often an all-night-long party — at which some form of electronic, synthesized music is played. The music is usually played by a DJ(deejay), who might specialize in one of the many varieties of electronica — techno, house, trance, ambient, hardcore, jungle, or drum and bass. Or he might play a little of everything, guiding the crowd to find the right feeling, and to bring the music and all the dancers into happy.