Personally I would not eat there if I had a shellfish allergy, but that completely depends on you and your allery.
If you would go to Red Lobster or Joe's Crab Shack, then I'd say "go" - but if you'd avoid those places, I wouldn't eat at Coral Reef either. Even if there's no shellfish in your meal, the chances are very good that a child (or possibly an adult) has touched THEIR shellfish and then touched the seat, the table, the wall, the podium, etc. Some of that has been cleaned up, and some has not. If you can handle that, you should be good to go!