This turned out to be surprisingly easy and productive, if a bit nerve-wracking at first. Google informed me that there's a center for women recovering from substance abuse run by Sisters of the Good Shepherd close to my apartment. I called them up and the nun who answered had no idea how to handle my bizarre request to drop off cookies on a Saturday night, so she gave me the cell phone number for Sister Marguerite, the manager. Sister Marguerite was extremely friendly, and accepted my proposition, agreeing to meet me at the administrative office, so I bought some cookies at a nearby grocery store.
She gave me helpful directions, and even left the gate open for my arrival.
When I was about to leave she asked if I had any questions for her, so we sat down in her office and chatted about the homeless shelter some Stanford friends and I are planning to launch in the next few years. She promised to call if she came up with any potential contacts for us. She was very astute, and intuited the dare I had been given when I asked to take a picture with her. She seemed to like the idea of Dare Us To Move when I explained myself :). Thank you for sending me on this quest, Sara, and for getting all of us moving, David.
P.S. I'm planning to email the picture of Sister Marguerite and I to Sara, who gave me the challenge, but I'd rather not post the photo online, because I forgot to ask her if that was okay with her.