What bodybuilder commonly stayed at the muscles house and was known for playing Hercules, Goliath, Sandokan in  Italian-made peplum films?
Stephen Lester "Steve" Reeves
Muscle House
Muscle House or Muscle House by the Sea was a famous (in bodybuilding circles) boarding house on the beach.
 The building was owned by Fleurette Crettaz, aka "Joy" and was located at 1659 Ocean Front Walk, Santa Monica, California.
 Joy was a fan of bodybuilding and would let bodybuilders stay for minimal rent.
 The house operated from the 1950s to the 1970s.
 It was a common waypoint for up and coming bodybuilders such as Steve Reeves, Vince Edwards, Jack Delinger, George Eiferman and Dave Draper.
Steve Reeves
Stephen Lester "Steve" Reeves (January 21, 1926 – May 1, 2000) was an American professional bodybuilder, actor, and philanthropist.
 He traveled to Italy in the mid-1950s to star in a series of Italian-made peplum films featuring characters such as Hercules, Goliath, Sandokan and others.
 At the peak of his career, he was the highest-paid actor in Europe.
Goliath and the Rebel Slave
Goliath and the Rebel Slave (Italian: Goliath e la schiava ribelle , also known as "The Tyrant of Lydia Against the Son of Hercules", "Gordian the Glorious Avenger" and "Arrow of the Avenger") is a 1963 Italian peplum film directed by Mario Caiano. Marie Mahabir
Marie Laure Mahabir is a retired professional bodybuilder and personal trainer of the French West Indies.
 As professional bodybuilder she became well known for development of the chest muscles, the biceps, and back muscles.
 Her highest achievement as a professional bodybuilder was reaching the top-five at both the Ms. International and Ms. Olympia in 1994.
 Today Mahabir lives in France and works as a personal trainer. Gianni Rizzo
Gianni Rizzo (1925–1992) was an Italian film actor.
 Between 1944 and 1986 he appeared in over seventy films and television productions, in a variety of supporting roles. His screen roles included parts in a number of peplum films, such as "The Vengeance of Ursus" (1961).
 He also appeared in Italian spy films, spaghetti westerns, and played the villain in the 1967 Perry Rhodan movie, "Mission Stardust".
 He died in 1992 at age 66. Hercules and the Masked Rider
Hercules and the Masked Rider (Italian: "Golia e il cavaliere mascherato" , also known as "Goliath and the Masked Rider") is a 1963 Italian peplum film written and directed by Piero Pierotti and starring Alan Steel and Mimmo Palmara.
 A crossover film, it is set in the seventeenth century Spain and it features Hercules (Goliath in the original version) in a Zorro-like scenario. Goliath Against the Giants
Goliath Against the Giants (Italian: Goliath contro i giganti , also known as "Goliath and the Giants") is a 1961 Italian peplum film directed by Guido Malatesta.
 It was Brad Harris's debut as a lead actor. Goliath and the Dragon
La vendetta di Ercole (literally Revenge of Hercules), better known as Goliath and the Dragon, is a 1960 Italian/French international co-production widescreen peplum film starring weight lifter and gymnast Mark Forest in his debut film role and Broderick Crawford as the villain.
 The identity of the title character was changed from Hercules to Emilius known as Goliath for release in North America by American International Pictures to tie in with their previous use of "Goliath" in "Goliath and the Barbarians" (1959).
 The film features special make up by Carlo Rambaldi. Špela Rozin
Špela Rozin (born 31 January 1943) is a Slovenian actress that became famous in the cinema of Yugoslavia.
 Her breakout role was the lead role in the film "Strange Girl" that became a cult classic because of the modern portrait of a young woman.
 Špela appeared in more than forty films since 1959 and she was also very popular in Italy because of the many peplum films she made there before coming back to Yugoslavia. The Beast of Babylon Against the Son of Hercules
The Beast of Babylon Against the Son of Hercules (Italian: "L'eroe di Babilonia" , French: "Héros de Babylone" , also known as "Heroes of Babylon", "Hero of Babylon" and "Goliath, King of Slaves") is a 1963 Italian-French peplum film written and directed by Siro Marcellini and starring Gordon Scott.