There's nothing about a 1-10 scale that implies that every visit to the restaurant will be equally pleasurable. Novelty is a factor. I would suggest that a sublime restaurant (a 10) will both make a really great first impression and also get tiresome more slowly (because restaurants like that tend to change their menu more dramatically, use a broader variety of ingredients, etc.). My utils from going to Cheesecake Factory would quickly approach zero after a few weeks of regular visits.