There are not that many restauraunts in Jeddah, and some of the better ones are in the many hotels - like this one.
As it's Swiss-owned and relaxed, it's a place where more liberal Saudis can meet up and talk without, say, having to be segregated or have their heads covered. The religious police tend not to come into these places, provided they don't work their tickets too much. There is, however, a "family only" segregated area - also known as "No Bachelors."
The food here is very good, and they have a theme night most evenings. Sometimes French, Mongolian, Italian, etc., when there is a special menu available and chefs on hand in the open-air, canopy-covered dining area to make some fresh stuff of your choice for you. The quality is excellent, as is the standard of service and politeness of the staff. Being KSA, though, there is no alcohol available, but they do have a range of very interesting fruit cocktails.