If you have a great company culture, and it involves an occasional beer on Friday afternoon, I don't think it's a problem, but if you're having a problem preventing inappropriate jokes, groping, etc. then alcohol is certainly not going to help. I don't think it's the biggest issue listed, but it does (to me) suggest that upper management was not taking the situation seriously.
Beer on Friday afternoon means everyone is relaxing instead of being busy with end-of-week deadlines for releases, progress reports, meetings etc. It is a good situation that offsets some of the inappropriateness of drinking and partying at work.
