Choco dipped cones at mc donald's
Have you seen it recently on a SoCal menu? It is not on McDonald's current menu.
They did a big promotion up this way a year or so back, only a few continued after the promotion period and I haven't seen it anywhere lately. You might contact McDonald's and ask
There are places, as mentioned, that have chocolate dipped cones. I don't think that there are any upscale type of chocolate-dipped ice cream cones in SF itself.