Well. Cooked for 16 people last night and thats the most i've cooked for. (I think it was 17 - i might be out by 1). Got asked to cook for them the night before as i've got two friends going overseas (Dave is off to Aspen and Dave is off to Brazil).
It went quite well, a tasty 3 course meal (lots of flavour) was accompanied by Dom Pedros and a few cheeky tequilas (thats dave's doing). The theme was that everyone had to dress in all white clothing (which a few people adhered to... not everyone has white trousers). I'll definately cook for dinner parties more often - its lots of fun.