No? Because Nikki Mandow, the editor of Idealog magazine went to a fair few. She kindly bought in a few of the posters that served as invites for us to have a look at.
Nikki went to the 1992, 1993 and 1994 Christmas parties. Our favourite is the poster for the 1993 Christmas party with the title "ANYONE SPOTTED AT THE COLENSO CHRISTMAS PARTY WILL BE SHOT ON SIGHT". See if you can spot some advertising legends.