Pattinson, 26, who attended the event sans actress girlfriend Kristen Stewart, went semi-formal with black T-shirt, denim jacket, black overcoat, and black pants.
He also posed for a photo with Gere, 63, who opted to go with a blazer, blue shirt and blue jeans, reported Ace Showbiz.
"Arbitrage" director Nicholas Jarecki was also at the luncheon.
Pattinson left the place early to have another lunch with Warner Bros executives at Soho House to discuss a new movie project.
Pattinson looked fresh after completing a promotional tour for the last "Twilight" installment, "The Twilight Saga's Breaking Dawn Part II".
