Many thanks to christeptep who shared two photos on websta here and here. Both were posted about 1 hr ago and they were both taken in The Jane Hotel which is in NYC. Looks like he slipped out of LA unnoticed.
Update: Many thanks to @JasonVasquezWF for sharing his photo with Keanu and John Leguizamo on twitter. The photo was taken at The Bushwick Starr.