Why You Should Stop Drinking at a Work Party

With my social anxiety I embarrass myself at work parties regularly. But it's the typical giggling at inappropriate moments or shaking so badly my wine spills- nothing too damaging to my nervous reputation. There are still others out there that need to buckle up and become a little more professional at my job.
Point in case: don't flirt, date, or sleep with your coworkers. Why is this a difficult concept? It seems at every work function with alcohol people have a) Flirted shamelessly with upper management or b) Had sex/made out with a coworker that night. Keep it in your accounting pants!!
And here's another no no at parties: My one coworker Erica has been disgruntled since she started recently (extremely recently) because she was promised certain roles in our company and then didn't get them. Wow, haven't heard this story before with my firm! I've told her to bide her time and be patient, let them feel out your skill level before pushing them to put you on complex assignments that managers with 6 years experience instead of your measly 2 are doing.
Between her 4th or 5th beer she must have forgotten my pep talk, for the anger runeth free at the bar into the ears of one of our senior managers. If I hadn't been dragged home by M, I may have been sitting right with her- but probably not. Hearing someone new bitch about how much they think data entry is beneath them in a room full of data enters is depressing.
From what the social grapevine (EVERYONE WITNESSED) tells me Erica fumed for two hours straight about this problem while intermittently hitting on the upper management member she was complaining to, while her date sat ignored tables away looking at the train wreck.
Now everyone who would've helped her get to the place she wants to be hates her, and came to me instead to give me their assignments because I don't whine about data entry. Ouch. I'd say something to her if she came into the office before 10am or stayed later than 5pm or if she didn't take 2 hour lunches every day, but she's never around.
Moral of the story: We all have to sling shit at one point so we can eat with gold spoons one day. Don't make fun of those with shit still in their hands.