Question: Who founded the famous chain of music-themed restaurants opening its first establishment in the UK city filming the prince and the showgirl?

<P0-S0> some historians concur that a&w, which opened in 1919 and began franchising in 1921, was the first fast food restaurant (e. tavares). <P0-S1> thus, the american company white castle is generally credited with opening the second fast - food outlet in wichita, kansas in 1921, selling hamburgers for five cents apiece from its inception and spawning numerous competitors and emulators. <P0-S2> what is certain, however, is that white castle made the first significant effort to standardize the food production in, look of, and operation of fast - food hamburger restaurants. <P0-S3> william ingram's and walter anderson's white castle system created the first fast food supply chain to provide meat, buns, paper goods, and other supplies to their restaurants, pioneered the concept of the multi-state hamburger restaurant chain, standardized the look and construction of the restaurants themselves, and even developed a construction division that manufactured and built the chain's prefabricated restaurant buildings. <P0-S4> the mcdonald's speedee service system and, much later, ray kroc's mcdonald's outlets and hamburger university all built on principles, systems and practices that white castle had already established between 1923 and 1932. <SEP> <P1-S0> rover dangerfield is a 1991 american animated musical comedy film starring the voice talent of comedian rodney dangerfield, who also wrote and co-produced the film. <P1-S1> it is about a street dog named rover, who is owned by a las vegas showgirl. <P1-S2> rover gets dumped off hoover dam by the showgirl's boyfriend. <P1-S3> however, rather than drowning, rover ends up on a farm. <SEP> <P2-S0> London has numerous venues for rock and pop concerts, including the world's busiest arena the o2 arena and other large arenas such as Earls Court, Wembley Arena, as well as many mid-sized venues, such as Brixton Academy, the Hammersmith Apollo and the Shepherd's Bush Empire. <P2-S1> The city is home to the first and original Hard Rock Cafe and the Abbey Road Studios where The Beatles recorded many of their hits. <P2-S2> Several music festivals, including the Wireless Festival, South West Four, Lovebox, and Hyde Park's British Summer Time are all held in London. <P2-S3> In the 1960s, 1970s and 1980s, musicians and groups like Elton John, Pink Floyd, David Bowie, Queen, The Kinks, The Rolling Stones, The Who, Eric Clapton, Led Zeppelin, The Small Faces, Iron Maiden, Fleetwood Mac, Elvis Costello, Cat Stevens, The Police, The Cure, Madness, The Jam, Dusty Springfield, Phil Collins, Rod Stewart and Sade, derived their sound from the streets and rhythms vibrating through London. <SEP> <P3-S0> On June 14, 1971 he and Peter Morton started the first Hard Rock Café (HRC) restaurant in London's fashionable Mayfair district. <P3-S1> The restaurant combined rock music, memorabilia related to rock 'n' roll and American cuisine. <SEP> <P4-S0> The Prince and the Showgirl (originally called The Sleeping Prince) is a 1957 British - American romantic comedy film starring Marilyn Monroe and Laurence Olivier. <P4-S1> It was filmed in London. <P4-S2> Olivier also served as director and producer. <P4-S3> The screenplay by Terence Rattigan was based on his 1953 stage play The Sleeping Prince.