Okay. So, first of all, go over to the phone near the bouncer and make a call, this will cause some zombies to show up.

Let them start turning people into zombies, making sure to stay away. While this is happening, start stabbing some of them so the number of zombies still stays down low.

The reason for this is that nobody cares if you kill a zombie, and the zombies will be effectivly taking care of everything for you.

Make sure to try to cull the zombie crowd, so there' not a large group a lot of the time.

Also, be careful when you kill them, make sure there's no chance you might accidentally kill a normal person instead.

And lastly, try lifting sleeping people onto the road. There's a chance they might get run over.