You go into a house, you never know what you’ll find. There could be one zombie, there could be five, there could be none. There could be a pantry full of canned goods, there could be bare shelves. If you spend more than ten minutes in one house, you’re risking getting surrounded, and anyway, if you haven’t found the good stuff by then, you never will.
Don’t even think about apartments if you’re out alone. one way in, one way out. Whatever’s in there isn’t worth your life. I mean, unless it is. If you’re starving, all bets are off.