Hi Matty.
Some wise words of advice about not getting off your tree at a works party,I learnt the hard way many years ago,and I love a party!.
Congratulations on your first,enjoy it,thats what its there for,if this is any help,I usually watch everybody else getting themselves into embarrasing situations,its more fun,and as Termite wisely said,wait untill you are in the company of friends rather than your professional collegues to let the hair down.
Take care,
Rich.