Suit - BB
Shirt - H & K
Tie - Charvet
PS - PRL
Cufflinks - Niletti Creations, NYC
Boots - Paul Stuart
Warning: Spoiler! (Click to show)
Tweed for dinner? Honestly, this doesn't seem to be any different from any other daywear outfit. I'd suggest a good midnight blue suit, black shoes and a satin tie, basic evening wear. Also, I second SB advise on the darker tie.