All the shops, eateries, cafes, and bars on one long, flat street, make this a great walking street, from Arguello all the way out to 25th Avenue. Spanning both Inner and Outer Richmond, there's a lot to explore on Clement.
There's a little area centered on Clement and 6th Avenue is often times called the Chinatown for locals.
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More can be read about The Richmond in San Francisco on Wikipedia.