Man it's quiet here.... sounds like you guys need a party!
Well, let's try Midnight Mess. Yes the Mess! Starts @ 11 pm on Saturday night and goes right through to dawn. Does that sound mad enough to you? I have only heard good things about it. Music styles are Retro and Neo Gothic, Glam, Bizarre Electro, 80's, and MORE! (okay, I cut and pasted the music style - sue me).
Igor won't be going (he has to serve the little masters), but that's all the more reason for you to go right!? All night dancing and DJs. Cost is 2,500 yen (but that includes two drinks - yes! two freaking drinks). If your up to it, just get your dancing shoes on and your drinking liver in for Midnight Mess.
Luna Si Soare (map on the Mess site - Roppongi 3-4-7 KY Roppongi Bldg. B1F / 03-3584-5570)