A friend of mine is organizing an event on the 22nd of December at Nuts & Bolts so I allow myself to post it here. Hope its ok.
Party begins with a live performance by the winners of the "battle of the bands", Verse6 and Rebel Inc., then goes on with a double DJ Set (Djs Fawaz and Ahmed). I think fees are : 10 OMR for couples (total+1drink each) and not sure for singles (I think you should book in advance).
If you're interested, I uploaded the flyer as a public pic on my profile. Click on it for more info. If you have any questions/requests, I can ask my friend.