I think there might be a line where having some limited alcohol available for those who want it at social events but not emphasizing it, especially not in a job posting. This job posting does tend to alienate non-drinkers, which just keeps them from even applying.
I can think of a few jobs that have a culture that emphasizes alcohol consumption. The United States Navy comes to mind. Here's some research to back that statement up: http://www.sciencedaily.com/releases/2009/06/090609130802.ht...