The following year, the Casino was demolished. Collins then took control of the park back from ARASERV. Throughout the 1970s, the midway stage played host to everything from soap opera stars to nostalgia acts such as Danny and the Juniors to bodybuilding competitions. In 1972 sports journalist Charles Gaines asked photographer George Butler to join him in covering the International Federation of Bodybuilding and Fitness's (IFBB) 1972 "Mr. East Coast" competition there for Sports Illustrated. The shoot included winner Leon Brown, the first bodybuilder to be showcased in the magazine. But more significantly, a young Arnold Schwarzenegger was also featured at the competition as a guest poser. Butler recognized Schwarzenegger's stage presence and he and Gaines would go on to make "Pumping Iron", a book and subsequent movie which introduced bodybuilding to the American mainstream. Portions of the film were taken at the park, and it would prove to be the launching point of Arnold's career as an actor on the silver screen. In addition to bodybuilding, regular wrestling matches took place at the Midway venue featuring Walter "Killer" Kowalski. One afternoon "Killer" bodyslammed Mark "Marbles" Midura so hard the ring collapsed around "Marbles" and his manager Nelson Brothers. Bingo was a big attraction for senior citizens in the Clambake Pavilion every Sunday, as was popular polka king Larry Chesky, a Holyoke native, and his orchestra. Happy Louie and Julcia's Polka Band, led by Louie Dusseault, also regularly performed at the Pavilion, including in his sets the eponymous Mountain Park Polka.