I have always had a thing about slate as it goes through me when a knife touches the slate, also it's really easy for food to fall off the slate.
I thought this story about a restaurant serving food on wooden slabs was interesting. Β£50,000 fine.
Incidentally, I now ask when in a restaurant what the food will be served on and if it's not a plate I ask for a plate.
http://www.bbc.co.uk/news/uk-e...-birmingham-42582900