Question: What band does Billy J. Kramer and Brian Epstein have in common?

Context paragraphs:
From a Window: "From a Window" is a song written by Paul McCartney, attributed to John Lennon and Paul McCartney, which was recorded by Billy J. Kramer with The Dakotas.  It was the sixth and final Lennon–McCartney composition given to Kramer.

Brian Epstein: Brian Samuel Epstein ( ; 19 September 1934 – 27 August 1967) was an English music entrepreneur who managed the Beatles.  Epstein first discovered the Beatles in November 1961 during a lunchtime performance at The Cavern Club.  He was instantly impressed and saw great potential in the group.  Epstein was rejected by nearly all major recording companies in London, until he secured a meeting with George Martin, head of EMI's Parlophone label.  In May 1962, Martin agreed to sign the Beatles, partly because of Epstein's conviction that the group would become internationally famous.

Peter Brown (music industry): Peter Brown is an American-based English businessman.  After Brian Epstein recruited Brown to run the Epstein's music store in Liverpool, he became part of the Beatles' management team.  He remained Epstein's and the Beatles' personal assistant until the band's dissolution.  He helped found and served as board member of Apple Corps and assumed Epstein's duties after the manager's death.  He went on to establish many companies and resides in New York City.

Alistair Taylor: James Alistair Taylor (21 June 1935 – 9 June 2004) was the English personal assistant of Brian Epstein, the manager of the Beatles.  As an employee at Epstein's company NEMS, Taylor accompanied him when he first saw the Beatles perform, at the Cavern Club in Liverpool on 9 November 1961.  Taylor subsequently worked as the group's so-called "Mr. Fixit", devising escape routes from crazed fans and assisting the band members in purchasing property.  He later became general manager of Apple Corps but was fired soon after Allen Klein arrived to address the company's financial problems.  Taylor published various memoirs of his years in the Beatles' employ, including "Yesterday: The Beatles Remembered" and "With the Beatles".

Bad to Me: "Bad to Me" is a song credited to Lennon–McCartney.  In late interviews, John Lennon said that he wrote it for Billy J. Kramer with The Dakotas while on holiday in Spain.  However, in a 1964 interview he said that he and Paul McCartney wrote it in the back of a van, so Paul contributed to it.  Billy J. Kramer with The Dakotas released their recording of the song in 1963 and it became their first number 1 in the UK Singles Chart.  Paul McCartney was present during the recording session at Abbey Road Studios.  The single would be released in the US the following year, and become a top-ten hit there, reaching number 9.  It became one of the first occasions a Lennon–McCartney composition made the US Top 40 recorded by an artist other than the Beatles (the first being "A World Without Love" by Peter & Gordon; another being "Goodbye" by Mary Hopkin).

Ticket to Ride (book): Ticket to Ride: Inside the Beatles' 1964 Tour that Changed the World is a 2003 memoir by Larry Kane.  It accounts his experience as the only American reporter to travel with The Beatles' entourage in their 1964 and 1965 tours of The United States and Canada, at the height of Beatlemania.  At the time the offer was given to him, Larry Kane was not himself a Beatles fan, so he wrote from the perspective of a journalist rather than a fan.  Kane was recognized by the band to be reliable, likable and professional, and he gained the trust and confidence of each individual.  As a direct result of this trust, Kane was given access to areas of The Beatles' psyches which other newsmen were not admitted to.  At one point it tells the story of how The Beatles' manager, Brian Epstein, was courting Kane; oblivious to the whole situation, and as a result, Kane unknowingly led Epstein on.  The book comes with a companion CD which contains interviews with The Beatles and commentary from the author looking back on the events from his current perspective.

Billy J. Kramer: William Howard Ashton, (born 19 August 1943), better known by his stage name Billy J. Kramer is an English pop singer.  In the 1960s, Kramer was managed by Brian Epstein, who also managed The Beatles, and he recorded several original Lennon and McCartney compositions.

The Beatles at The Cavern Club: The Cavern Club at 10 Mathew Street, in Liverpool was the venue where the Beatles' (formerly known as the Quarrymen) UK popularity started.  John Lennon, Paul McCartney, George Harrison and Pete Best were first seen by Brian Epstein at the club.  Epstein eventually became their manager, going on to secure them a record contract.  Best was replaced by Ringo Starr on 16 August 1962, which upset many Beatles fans.  After taunts of, "Pete forever, Ringo never!" , one agitated fan headbutted Harrison in the club.

A Cellarful of Noise: A Cellarful of Noise is the title of Brian Epstein's 1964 autobiography.  His assistant, Derek Taylor, was the ghostwriter of the book, which describes the early days of The Beatles, whom Epstein managed.

Epstein Theatre: The Epstein Theatre, built in 1913, is one of many theatres in Liverpool, England.  It has been threatened with closure several times, but reopened in May 2012 after a £1.2m refurbishment.  It has now been renamed the Epstein Theatre, in honour of Brian Epstein, the manager of The Beatles.  The theatre seats 380 on its two levels.

Supporting paragraphs: Billy J. Kramer Brian Epstein
Answer: Beatles