If the apocalypse were to happen and it's every man for himself, where would be the best place to take over and control while armed?

It's an apocalyptic, "every man for himself" situation. What's the best place to takeover and control?

You and whatever small group of friends, family, and allies are already armed (unless you're an anti-gun pus sy; in that case, you can just get shot and robbed).
An unoccupied Hypermarket (K-Mart, Walmart, Target, etc).
A Hospital but it already has many people inside.
The only Gun Store in the city and the only one there is the accommodating owner.
The abandoned Power Plant running on auto emergency power.
The Military Base, but there's a 50% chance they threaten to kill you instead of letting you join.
The Mansion of the richest person in town, and it's just he/she there alone.
Another place (explain).
Select gender and age to cast your vote:
If the apocalypse were to happen and it's every man for himself, where would be the best place to take over and control while armed?
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