True all the bigger (read: more expensive) restaurants usually have their own parkinglot, unless they are in the middle of the city like Antwerp.
I live about 150 meters from a veru good restaurant and they have their own parking lot, and i can see practically every weekend sport/luxury cars parked there like Ferrari, Porsche Aston Martin, Bentley and all that stuff, but NO valet.
Actually they did try that last year for a while, but apperantly it didn't work out so good, don't know why