Wicked indeed! I don't think we should condone this sort of thing at all (wink wink!)
Some people have reported that this will set off headaches and cravings, others don't have these sort of sypmtoms. Be ready to suffer and have to be strict with yourself for days afterwards. The other thing to expect is that you might not enjoy the treats as much as you think - this has happened to me. Once you lose the taste for sweetness it seems to be just too much, and you don't enjoy it. I can now look at the most exquisite displays of desserts without a hint of desire or regret.
If the restaurant is so nice, then all the other yummy things you are going to have will be treats anyway, and as this is a new way of life, maybe you don't really need that dessert? Think about it! What about a nice cheese platter?
But if you do go ahead, then of course that week (before and after) you should be incredibly extra strict about any other fructose creepng into your food.
Happy Birthday!