HAL9000
Lifer
I went to one in London years ago, it was great fun.
Lots of good food stalls and music.
The only dodgy bit was when I went to check on my friends kid in the childrens area and the scary bull dikes there made me change his nappy.
That does sound fun (except the kid bit) Didn't know about the food stalls, this thing is really being sold to me in this thread.