Across the way from a barbed-wired fence on Jessie Street sits a large, metal door like any other. On the other side of that door is a room flooded with light, color, and most importantly, plants....

It’s ten in the morning on a Wednesday, and Jake Richard is packing his bag for the day ahead — double checking to make sure his jiu jitsu gi is clean and crisp. Richard heads out to the BART station...