Some people think older folks baring their bits is gross. For example, the producers of the 2003 British comedy Calendar Girls, which grossed nearly $100-million at the box office on a comparatively paltry $10-million budget.

That’s a ton of bums … in seats.

Plenty of skin on screen too — and soon calendar enthusiasts of all ages can check out the Arts Club production at the Stanley Industrial Alliance Stage.

It’s based on a — wait for it — revealing true story. In a nutshell: middle-aged Annie loses her husband to cancer and best friend Chris hatches a crazy plan to raise money for research. And it’s not baking cookies. But there’s a wrinkle in the plot: how to convince the tea-totaling frumps down at the Women’s Institute to gear down for a cause?

Comedy ensues. But, as director Rachel Ditor explains, it’s not just fun and games.

“I love all the aspects of celebration in this story,” she says. “It’s a celebration of community, friendship, risk taking and beauty, and the credit it gives to people who have suffered loss and find the courage to reach out to others.”

Here’s the best part: the real-life Calendar Girls have produced 10 calendars since 2000, raising more than $6-million to fight blood cancers.

Now that’s a figure we should all take our hats (and whatever else) off too.

The Arts Club production stars Shirley Broderick, Anna Galvin, Aslam Husain, Shawn Macdonald, David Marr, Jane Noble, Wendy Noel, Lisa Norton, Linda Quibell, Kerry Sandomirsky and Colleen Winton.

Calendar Girls opens Jan. 26 and runs until Feb. 26 at the aforementioned Stanley Industrial Alliance Stage (2750 Granville St.). Ticket $29 to $65.

More information at artsclub.com.