John Travolta portrays Adam Lawrence, a journalist for Rolling Stone magazine investigating the fitness club scene in Los Angeles.
Jamie Lee Curtis plays Jessie Wilson, a group fitness instructor and love interest of the main character, Adam Lawrence.
Anne DeSalvo is Frankie, a close friend of Jessie and part of the fitness club community.
Marilu Henner portrays Sally, another friend of Jessie and part of the fitness club scene.
Laraine Newman plays Linda, a member of the fitness club scene in Los Angeles.
Mathew Reed portrays Roger, a character within the fitness club community.
Jann Wenner plays Mark Roth, a character involved in the fitness club scene investigated by the protagonist.
Stefan Gierasch plays Charlie, another character within the fitness club community in Los Angeles.
Kenneth Welsh portrays Joe McKenzie, a character related to the fitness club environment.
Ronnie Claire Edwards plays Melody, a character within the fitness club community.
Murphy Cross is Dita, a character involved in the fitness club scene in Los Angeles.
Murphy Dunne plays Peckerman, another character within the fitness club community.
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