Near the gates to Golden Gate Park in the Haight Ashbury (hippy dippy) district, the Citrus Club serves wonderful noodle dishes and soups at very low prices.
Sit at the bar and watch the chef operating his magic wok over a flame-thrower of a hob.
Perfect for lunch before a long tramp around the park.
Get the bus to Haight Ashbury and walk down the main drag towards the park (lots of thrift shops to dawdle in on the way). The Citrus Club is on the right, about 200m. before the park gates.