Mardi Gras...
First off, I followed the courier out of the inital bar, until he went to a dumpster. I sedated him, and took his bird outfit. This can be trouble, because the female target usually finds if you don't throw him into the dumpster fast enough.
From there, I met the guy who gives the contract. He eventually turns his back and looks out the window, so I fiber wired his punk ass, and left his body on the outside porch. His bodyguard always walks in and out of the room, and if he sees you without the target, he will open fire...so I just stood outside and waited for to him leave again. Soon as he turned his back, I shoot him with my silenced silverballer.
From there, I went outside the one club (can't remember which) and waited in an alley. A club member always goes into the alley for a smoke or something. Sedated him, took his costume. Went inside the club, to the top floor.
The male sniper is always on the porch, and you can kill him anyway you choose. I used the poisoned needle.
Final female target walks around a lot, always into an alley near another club. Got her with the silenced silverballer, then quickly left the stage.
My memory is a little foggy on this one. It's very tough to earn "Silent Assassin" on this one. I had to kill the first target's bodyguard after I killed him no matter what. There is a way to kill the female by planting a bomb on the winch that suspends a piano that she walks under. I never tried it, though.