They key to the best neighborhoods for walk-ability isn't just retail. It is retail with narrow store fronts. By keeping the store fronts narrow you create a

They key to the best neighborhoods for walk-ability isn't just retail. It is retail with narrow store fronts. By keeping the store fronts narrow you create a situation where you have a lot more variety per walking distance. SOMA (south of market in san francisco) is way less good than it could be because there is so much less variety than say 24th street in the mission, or valencia in the mission or Green/Union etc. in North Beach.