What is one expected to do on a Hens Night?

Do we live it up, get blind rotten drunk, whistle at strippers and stumble home at dawn?

Or, alternativly, do we go to a comedy club, nibble strawberrys and champagne, and indulge in some divine gastronomical inventions?

I want to know. I'm going to a Hens Night tonight, and I really want to know what to expect!