Do you want to get into the Club Vox offices without using a multitool, or the basement without one either? Here's what to do:
1) Go to the second story dance floor.
2) Go to the far end, there should be a door that requires a mutitool or passcard.
3) Ignore the door and turn around to find a stack of box-kind-of things. Get on them.
4)Jump from that stack to the roof of the door you just saw.
5)On the roof there is a vent, just climb in. No multitool required! Before climbing in though look next to the vent, there's a free mutitool.
6)After climbing in look for the fan, just in front of it is yet another multitool!
7)Now if you want to kill someone, nows the time. Get a sniper rifle from somewhere else, put a silencer on and come here. Walk to the edge towards the dance floor and snipe random people w/ headshots. It's so fun!
8)If you don't have a melee weapon grab the crowbar in the storage closet room that the vent opens up to.
9) Before you open the door to the hall from the closet crouch. Open the door but wait, do not rush in.
10) Equip the melee weapon and follow the bouncer, when his back is turned pop up and hit him until you're sure he's dead.
11) Now you can casually walk around upstairs without a problem.
12)Go into the office, use one of your free mutitools to open the safe and get that stuff.
13)On a small book shelf there should be the basement keycard.