"Bobby celebrates his single status as he witnesses all the various aspects of marriage problems and circumstances with his friends," he said.
"But he gradually changes to grasp the idea that being alone is not the best of human conditions."
Co-director Brendan Hanson plays Bobby, after a memorable performance as Jean Valjean in ICW's production of Les Miserables in November and coming sixth in the Channel 10 reality show I Will Survive.
"I feel we need to bring these iconic musicals to Perth if we can, also providing opportunities to our local artists at the same time," Westrip said.
"If we can do this and also create a profile for the charity while providing sophisticated entertainment, then we are fulfilling a great community commitment.
"This is one of the most artistically accessible, thought-provoking musicals that can appeal to all."
With 40 years' experience singing, conducting, directing and lecturing, Westrip was awarded the Order of Australia Medal for his services to music as a performer and teacher in 1998.
"I am very keen for others to believe we have excellent talent here in WA that needs to be nurtured and exploited," he said.
"The difficulty is producing a quality production with a minimum budget while letting everyone know the show is on and worth the experience.
"To get artists of quality, which we have, requires a great amount of faith in me and the company.
"We have a wonderful team of artists and support crew that deserve to be supported not only because of the product but because of their commitment to the art."
Company plays at 7.30pm, May 1, 2, 3 and 4 with a 2pm matinee also on May 4. Book through Ticketek or on 132 849.
The ICW Performing Arts Association is also offering a special deal: buy two tickets for Company and receive one free ticket for Cats in July. The deal is only available by calling 0416 251 265.
The Subiaco Arts Centre is at 180 Hamersley Road, Subiaco.