While I know native San Franciscans who say that there are a lot of great, cheap ethnic restaurants on Market, you have to be careful not to get into the Tenderloin part of it. This is a notorious district that has a lot of crime and panhandlers. It just isn’t worth it. The strip clubs and joints are not places that attract the average tourist. My advice is to avoid this part of Market. It is a long street, though, and some parts are fine.