We had a zombie themed party and included a Winchester Tavern theme from Shaun of the Dead to the decorating. This was quite easy. I found the Winchester Tavern logo online and printed these on full sheet stickers (some clear and some white) I also printed the words Winchester Tavern on the same stickers. I found a Keep Calm and Kill Zombies poster at www.posterreveolution.com The only thing missing is the Winchester rifle itself. If I did this again, I would definitely find something similar to hang up.
You don't need a lot of props for this. This could be a nice add on for your bar area.