It's a difficult thing, trying to plan to arrive at the club at precisely the correct level of drunkenness. Too little and the music is terrible, and it will cost you a fortune in drinks. Too much, and the room is spinning before you get in, that is if the door staff allow you in drunk.
Generally, out to town by 9 for some drinks, possibly having had a couple of "short ones" prior to departure. Aim to be in the club for midnight in order to get a few hours raving and hardcore shenanigans in.