Just to clarify, yes there are two superchargers in the alley in the back of the service center and several HPWCs against the building and in the lot across the alley. The staff in the service center said this supercharger would not appear on Tesla's map and asked that one call ahead to see if a supercharger was available. Personally, that alley is not the best place to be in the middle of the night and they might be concerned about someone not familiar with the neighborhood becoming a statistic.