1 Hat and chocolate
This tends to end in a scrum of women fighting on the carpet with chocolate all over their faces. Sad, really, that the boyfriends aren't allowed. The rules are simple: you need a bar of chocolate (the bigger the better), a knife, a fork, gloves, a hat, a scarf and a dice. Takes turns to roll. First person who rolls a six has to put on all the clothes and start eating the chocolate with the knife and fork - until someone else throws a six, when they have to get the gear on and chow down. Spice it up with an extra rule: if you roll a two, you have to down two fingers of booze.
2 I have never?
Everyone takes turns to complete the statement: "I have never?". You're welcome to lie, because the actual game is that the players who have done the thing drink two fingerfuls of booze, while the girls who haven't, don't. So the naughtiest girls end up the most pissed, which is a bit like real life, only more so.
3 Make mine a willy
Feeling creative? Then buy in enough Mould-A-Willy Kits for everyone and make life-size models of your blokes' dangly bits. How will you judge whose is the most lifelike? That's up to you, girls!
So Ladies what game will it be?
ladee-bird
Pro 
I've played those first two games - particularly I have never although I tend to have to lie as I never get a drink because I'm too innocent haha!
You should set up a 'Hen night organiser' business