How do you 'do'?

I had my first proper Christmas do a couple of weeks ago.  Before you ask, a 'do' is basically a party.  They have a 'hen do' or 'stag do' before someone gets married, a 'leaving do' when someone leaves a job, and a 'Christmas do' for Christmas.  I'm not entirely sure on the restrictions or qualifications for something to be a 'do,' but apparently there's no such thing as a 'birthday do.'  There are still so many intricacies of British culture that I have yet to learn.  Teaching and working here has cleared many of them up, but clearly, there are some I'll never understand.  Anyway, our 'do' was in a room at a posh hotel in the town where the school is located.  It was a Friday night and it was fancy.  No jeans and a Christmas jumper for this one.  All the women were wearing party frocks with a bit more skin showing than I'm used to seeing from my coworkers.  In the absence of a skin-baring party dress, I opted for a long-sleeved black wrap dress.  I have to admit, I looked pretty hot.  Robyn and I had been invited to a 'pre' (a pre-party party where people get ready and usually start getting drunk) at one of the other teacher's houses, but opted to just get ready at home.  I took a nap, knowing that I would need all of my energy for what was to come.  At the hotel, we had a nice Christmas dinner, which is basically Thanksgiving with the addition of roast parsnips, pigs in a blanket (mini-sausage wrapped in bacon) and Christmas pudding for dessert.  
As exciting as bacon wrapped sausages are, it was after dinner that the real excitement began.  There was a disco, by which they mean a DJ and dance floor.  I can honestly say, it was one of the weirdest experiences of my life to boogie with a bunch of tipsy teachers.  We're generally a pretty straight-laced group of people, very rule bound and professional.  Not on Christmas do night.  They were letting loose.  The Latin teacher was my favorite.  She's a pretty big nerd and had said earlier that she'd only dance if they played good music, like Michael Jackson and ABBA.  True to her word, when the first few bars of "Dancing Queen" blasted through the speakers she was on her feet and proceeded to flail about in a manner that I can only describe as 'rhythmically challenged."  It was brilliant.  By comparison, I looked amazing.  Having never been drunk, I can't speak to how uninhibited one feels when intoxicated, but having witnessed the work Christmas do, I can honestly say I'm grateful that at least when I make a fool of myself, I'm aware of it.  My housemate and I danced the night away and thoroughly enjoyed ourselves.  It totally blew all of my other work Christmas parties out of the water.  I think it's a tradition I'll have to bring home with me.