Any good tips for nightlife in Tokyo?

It depends on what you enjoy and your budget. Can you please give us something a bit more specific?

Good clubs, quality bars, budget isn't really a problem.

Also interested in traditional performing arts - kabuki sounds good. Is bunraku/takarazuka/noh worth seeing?

Quality bars--probably not the best value, but the bar at Park Hyatt in Shinjuku (very Lost in Translation) has amazing views.

Traditional performance--I also enjoyed kabuki. They have matinees/soirees, the latter starting around 6pm. I don''t think the others have evening performance. Noh is worth seeing if your favourite kind of music is Gregorian chants.

Another Hyatt recommendation: nice jazz lounge and a happening bar at the Grand Hyatt in Roppongi. And, well, there is lots of lively nightlife should you decide to venture further into Roppongi....

Maybe I should elaborated my comments on Noh. I went to see a performance in Kyoto once, since my close friend was a gaijin scholor of Noh and she invited me. The costume is quite elaborate, though the stage and masks are quite on austere side. Stories have something to do with ancient poems--VERY slow moving, though the movements are quite elegant. Unlike Kabuki, there was no english translation/ explanation available on earphone. I think I fell asleep (shame on me!) after about 15min.

I enjoyed kabuki on several occasions--make sure you get english earphones. Also lots of good souvenirs.

Never been to takurazuka. I'm not that thrilled about all girls revue troupes. Though I have seen groupies(?) hanging out near Imperial Hotel.