I also think going to walkable area with easy/cheap parking and a place to meet afterwards to share the sketches is a good idea - since it's "wintertime", somewhere that still has holiday decorations might offer more things to draw. Americana in Glendale would be somewhere new to try.
Some people in the past suggested Echo Park and Universal Citywalk. Also: has anyone been to Grand Central Market/The Bradbury Building in downtown LA? If so, how walkable/meetable is the area?
In the past L.A. Sketchcrawls as far as I remember, we've been to: Pasadena, Olvera Street/Union Station, Koreatown (which I missed
), Venice, Santa Monica Pier/Third Street Promenade, The Grove/Farmer's Market, Chinatown, Little Tokyo, Balboa Park, Eaton Canyon, Marina Del Rey. We can certainly visit any of those places again if there are enough interest.