Many thanks to jriveraphoto for sharing a short clip of Keanu on instagram. He met him today. I am assuming it was in LA since Keanu will be participating in Stand Up to Cancer tomorrow. Two screen caps below.
Update: He has posted in the comments since I put the post up that this was in Detroit.
Many thanks to misterryanboyd for sharing a photo from Detroit. In the comments he said they were there on business with one of the Arch Motorcycle vendors.