I am coming to San Diego for a conference, which will be held at the Sheraton San Diego Hotel & Marina -- right across from the airport. As far as I can tell, there's nothing nearby except perhaps Liberty Station (Trader Joe's and Tender Greens). Can anyone point me to other good eats that are accessible by foot, public transport, or a short cab ride? I won't have a car, and I don't want to spend three days eating hotel food! I like to walk, so a mile or two isn't a big deal -- as long as it's through reasonable neighborhoods.