My wife and I are traveling to SF for her to attend a conference. We will be staying at the Hyatt Regency, Embarcadero Center, where the conference is held. Neither of us have ever been to San Francisco, and since we are flying, are limited to public transportation. I would like recommendations for dinner in that area that would be inexpensive. We like ethnic food, and enjoy trying new (to us) cuisines. Since we will be free in the evenings, would also like recommendations for various neighborhoods that can be easily reached by public transportation, are safe, uniquely "San Francisco", and where we can walk around to get a flavor of the area and enjoy a simple, inexpensive, good meal. In short, if your friends were visiting San Francisco for the first time, and you wanted to show off the city, where would you take them.