Isn't that a mess jacket, not the conventional DJ? Jeeves once had quite the fit when Bertie brought one of those back from the south of France.
B: I will have you know, Jeeves, that I bought this in Cannes. J, horrified: And wore it, sir? B: Every night. - at the casino. Beautiful women used to try and catch my eye. J: Presumably they thought you were a waiter, sir.