Isn't that gay day this year? If so you wont be able to swing a dead cat (or a man bag) over your head without hitting a gay person.
So I would choose the club baised on your age.
Adventures is fun for relaxing and if your older.
8-Trax is great for the old 70's disco.
Maniquins will be tough to get into, there is always a huge line on gay day, and its retro young crowd stuff.
If you are alone, I would suggest Adventures Club early, let it be known its your birthday, and you will have a ton of friends within an hour!
Happy Birthday by the way!
Yes I just checked, it's gay days, pretty much the whole Island will be gay that night, so your birthday should be pretty festive!
Mike