Many thanks to @film_EGO for sharing on twitter.
@film_EGO has shared the photo he took with Keanu Reeves and William Defoe when he ran into them during the John WIck shoot. It is not which day the photo was taken, but I suspect it it may have been on Thursday, October 31. There were tweets on Thursday that said Keanu was in the Brooklyn Roasting Company with blood on his shirt.
You can view the photo here.