Many thanks to 蚊子的本劳斯农场 for sharing nine photos on weibo and to SC for sending the link to the site! Photos were posted yesterday with a comment that they were taken at a local diner during the Arch ride. For those who have trouble accessing weibo, they are in the site twitter feed.
Update: Photos are definitely from yesterday’s ride. Hollywood Pipeline has posted 10 of them. From what I can see of the outside, it looks like they were at the Sunset Restaurant in Malibu.