The couple, who tied the knot on Oct. 12, "were super-affectionate at dinner" at Étoile restaurant at the Domaine Chandon winery, an eyewitness tells PEOPLE.
"There was lots of kissing and hand-holding," the eyewitness says. "Rose was excited to talk about the wedding and her dress, and Davey chatted up Dave Grohl who was at the table as well."
Former Glee star Dianna Agron was also at the event, and was spotted chatting with Miles Teller, who stars in The Spectacular Now, before heading out to the afterparty with friends.
Colin Farrell was also in attendance, and while the rehabbed star appeared to be on his best behavior, the eyewitness says Foo Fighters rocker Grohl ended the night chatting with locals behind the bar at the Napa dive bar Pancha's.
Reporting by ALEX APATOFF