You managed to get a glock and an Uzi, but your in a ghetto populated area, where you have no survivors, and the area was sadly highly populated. You have around 4 clips for each gun, and you brought a decorative scimitar and a crowbar to start with. Your backpack is filled with cans and dry food, a perfect supply run you think. Around an hour walk away from your base, you notice something amiss. Behind you, there is a roaming mob of 100 or so zombies, they must have followed you. Do you make a break for the base? Or try and take some out? Your base has little defenses, besides a mounted gun and 1 other survivor. The mounted gun has about 20 shots, which is pitiful.
First thing I would do is speak a low expletive under my breath, as is seems to be the universal human response to such things.
Okay, ghetto implies several things to me, drug dealers, and tenements.
Plan (A)
I look for a house marked with bars on the windows, and some low-riders out front. With luck, I can find a crack house.
If so, these suckers tend to be pretty well armored. If the door is open, perfect, get in, throw the dozen or so locks, do a quick sweep to make sure the residents have all wandered away, and shoot at the zombies through the gun slits. If not, hopefully not all the locks are in place, try to crow bar it open, then lock the remaining locks, and pull a sofa in front of the door. Less time to search, if this is the case, but them's the breaks.
I also do a quick look for any drugs (a very valuable commodity in the post-zombie world, I imagine) fire power (these guys are usually better armed them the cops) and check out the escape hatch that these things always have, in case they get raided.
Once all the zombies are dedicated to the task of getting in, I get out, go through an alley or two, and head home.
Plan (B) No crack houses?
Tenements
Tenements tend to be built high, cheap, and close together. They are also highly populated.
This makes the buildings dangerous, but at this point, they are my only hope.
So, I make sure the zombie hoard sees me, putting a few Uzi rounds into any that seem particularly agile, or quick. I choose a building by (hopefully) spotting one with some lights, a fire escape into the alley, and no visible zombies.
Carefully, I enter the building, glock in hand, clearing out meat-puppets in the lobby, as required.
I work a forward and back motion, racing ahead to clear corridors, then back to make sure the zombie horde still sees me.
Once I get to the fourth floor, I sprint away from them, down the halls. I start banging on doors, trying to find one without a groaning noise behind it. Once found, I crowbar my way in, shove a sofa in front of the door, and head out the fire escape.
If the alley below seems clear (and i will drop the scimitar, or some other piece of useless stuff to see if it gets a reaction) then I will head down, then work my way back tot he street, hopefully now free of the horde, and continue onward.
If the alley seems unsafe, I will head up, and do some roof-top travel, until I find a safe alley to head down into.