oh, sweetie, i know how it is! usually your best friends receive the brunt of it, and you just end up feeling worse -- guilty -- afterwards. i know you probably don't want to hear this at all, but ALCOHOL WILL MAKE THE ANGER WORSE. you may think of it as a sedative, but really it just makes it more difficult to maintain self-control (ie: to stop yourself from exploding).

you said that therapy more often than once a month won't work. i'd encourage you to do absolutely whatever you can do *make* that work. it would be better than losing your job or your friends, and you wouldn't have to go more often forever, just until the problem gets under control. maybe your therapist can meet you over lunch, before work in the mornings, later at night; or maybe just join a support group that meets at a good time for you, or just find a friend/co-worker that can empathize, that you can meet with for coffee/lunch or call when needed.

there may also be some other options:

* it seems you're not on any mood-stabilizers or anti-anxiety meds. do you have a good psychiatrist, or is it just a regular physician and your therapist? it might be worth seeing a psychiatrist a little more often, just temporarily, to find meds that are more effective. i've had success with lamictal as a mild mood-stabilizer. i also think there are drugs out there that might be more fast-acting for those sudden angry outbursts (like, something you could take as needed when you're feeling especially short-tempered).

* you say you "can't" do yoga/mediate at work, but you "can" drink at work? sounds like my kinda job! oops, just kidding. perhaps you mean it's easier to conceal alcohol, than to find private time to meditate or do yoga. it IS possible to practice yoga in the midst of other people, without rolling out your mat and changing into work-out clothes! no one need know that you're doing it. you can always practice yogic breathing, or just adjust your body posture to open up your airways or "circuits" a bit. it sort of helps you "remember" the calm you experience from a regular yoga session. if you can't consult with a yoga teacher, check out a good "teach yourself yoga" book from the library, or get one at a bookstore. i'll try to get back to you with some good ones, and page numbers, and stuff.

there are all sorts of other things that might help, but i'd try the extra therapy, med changes, and breathing first. and keep talking here -- if you're talking about it, you're at least trying to overcome it!