Another highlight of the Beatles' 1965 Los Angeles trip was their summit with Elvis Presley, on the evening of August 27th. A thorough examination of that meeting can be found here:
In subsequent years, none of the Beatles would recall jamming with Elvis, however informally, but their memories were fresher the following day. Here they are in San Diego on August 28th describing the Elvis meeting to Larry Kane. They also spoke about Elvis with Jerry G. Bishop that day, in chats following the San Diego press conference.