It happens on a Saturday evening in a covered split level car park from around 7 to 7.30 onwards and is well worth a visit.If you want to bring your other half she,or he,can go shopping in Bluewater which is open till 10pm and just thru the double doors!Coffee shops and Krispee kreme 2 minutes away.
More indepth info is on forums like E36Coupe,Bimmerforums,E46Zone and M3Cutters.
If you fancy it PM me and we'll arrange to meet up and go in together.No fee's involved just make sure your car is clean as its under flourescent light

See you there ?
Gaz