Your exotic tour of San Francisco's huge Chinatown starts at the large and colourful Chinatown Gate. Then, Grant Avenue lays out its jumble of real and fake antiques, garish souvenirs and traditional lucky charms, to a soundtrack of disco tunes with Asian inflections. On Stockton Street, in the mornings, numerous Chinese get their supplies at the stalls. Portsmouth Square is a haven, where people practise tai chi or play mahjong.