Dubai's nightlife scene has come along in leaps and bounds since the mid 90s. Although Dubai is not quite Ibiza, Berlin, New York, etc, it certainly has enough noise and laser beams to keep most punters satisfied now.
Most, if not all, of the clubs listed are open until 3 am. At which point the music stops and the lights come on. Abruptly. There are apparently large fines levied on the establishment if music continues even seconds after the gong. During Ramadan check to see if they are open. Many will be closed, and the ones that are open will be very subdued - no live music or dancing is allowed then.
The rest of the year, many Dubai nightclubs have a lively atmosphere with some world class DJs appearing on a regular basis in recent years. For example Hed Kandi and Groove Armada (at Trilogy), Paul van Dyke, DJ Tiesto (at Madinat Arena - not a nightclub), DJ Krafty Kuts (at IBO), Eric Morillo (at Trilogy), Ferry Corsten and Schiller at Peppermint Club, and many others.