There's one located in one of the maintenance rooms in the South Plaza. I can't specify which one, but there's only two in there I think, anyway.

Pitchfork sucks. It's just a bunch of hipsters who can't decide on their current phase in their late-term puberty unknowingly declaring "pop" indie music good, while leaving the actual talent alone in a dark alley to fend for itself. 
 
Oh, different pitchfork? Sorry man, don't have the game. I hear Abyssfull knows, though.

I believe there's one in the Yucatan casino.

There is a pitchfork outside in the main plaza area stuck in the grass. There are 2 in the steakhouse in the foodcourt attached to the slot ranch casino.

In the food court there is a restaurant with 2 on the wall, i think there's a shotgun near there too somewhere