Just my 2 cents but I think a lot of our working culture is really stressful... and we are taught to deal with that stress through alcohol and drugs (and tv and junk food and sex etc. etc. etc.) rather than through healthier and ultimately more satisfying methods like exercise, talking, taking a walk, etc.
Anger and frustration are always triggering for me and work can bring those feelings on. However, I find it helpful to remember that alcohol is a temporary escape from a problem - not a solution. It was great for me to finally discover that there are things I can do which will actually make the stress better - not simply obliterate my mind for a few hours...