Zombie outbreak highest frequency: Cities.
In all outbreak models, you can see the "outbreaks" start at the major cities and spread out like a growing fungus.
If you have a death wish, go to a city during a zombie outbreak: it will have the highest concentration of zombies. You will also have the least likely chance of survicing from just a "food" perspective alone. Unless you magically get stuck in a Super-Market when NO ONE was in it at the time of the outbreak and no one enters is before you fortify it, you will not be able to get any food, at all, without having to dangerously enter the "outside" to make it to some food. The food? It will all rot in a day or 3 without power...which is most likely what would happen during an outbreak of apocolyptic levels. You can't "hunt" down a can of beans in a city. You can certainly hunt down a wild animal in the woods.
Absolute worst place to be during a zombie outbreak: Cities.
Absolute best place to be: Rural coastline with a boat.
Also, don't forget about eating the zombies. Just because they are trying to eat you, doesn't mean you can't eat them. It would be just like any other pathogen: prepare you food carefully, wash your hands afterwards...don't cut meat with any cuts, and cook your meat until it is well done. That's a nice source of food for, at the most, the first 28 days.
Also, the MASS deaths would create TONS of vermin and pestulance. If you manage to survive past the first 28 days, you'll need to know how to deal with that and/or avoid it.
My team:
RJ
StarCraft2
ImmatureRainbow (I was thinking of the person who may have the best cardiovascular fitness and she may be it. Also, she will be in better shape than anyone on our team.)
Impediment
Robtard