Cost and acreage no consideration?
I'd absolutely include a short loop of par 3 holes that have interesting greens and few hazards. The game will grow if we make the game available to our children. Taking them to the range or the putting green -might- turn them into golfers, but actually giving them a place to play alongside mom or dad will go much further in guaranteeing it. Similarly, many spouses and friends would be more inclined to play if they were given the chance to learn on a much less intimidating playing field. Make the holes fairly long and wide and the beginning golfer will learn to hit shots both off the tee and the turf. If those holes also have interesting greens, the golfer nurturing the neophytes will be excited to play there, too.
Modified to add:
Some might say that's what par 3 and executive facilities are for. True, and kudos to them. But if the opportunity is there, I'd contend that such a setup is much more effective as a recruiting/retaining tool if it is part of a larger facility geared toward high-quality golf. These holes should be maintained in the same manner as the big course. Playing them should involve checking in with the starter. It ought to feel... important, for lack of a better word. The experience should provide ample doses of wonder and awe for the young/new golfer, and the rituals are a large part of that.