I will be in San Diego later this month (October) on business, and will stay an extra day to see the Zoo (on a Saturday) before catching a red-eye flight back East. I've never been to San Diego before, and may never get back there again. Is there any really special type of cuisine or dish or restaurant (on the casual side, and preferably close to the Zoo or Old Town) that you would consider a "must" for someone on their only visit to the city? I like most types of cuisine. Thanks.