Diane Keaton, Kathy Bates Bring Fun to ‘Summer Camp’

That’s the message we get from “Summer Camp,” another “Book Club”-like comedy from Diane Keaton.

Here, she’s one of three friends since grade school who hold a reunion at the summer camp they held dear. The three haven’t been as close as they once were, but this gathering could change all that. Or not.

Kathy Bates plays an over-the-top self-help author who wheels up in a bus made for rock stars; Alfre Woodard is a medical worker who regrets not getting a doctorate. Together, the three zipline, tease the boys they once liked and talk about what might have been.

Considering “Theater Camp” and “Wet Hot American Summer” mined so much from this setting, “Summer Camp” could have been so much more.

Even Beverly D’Angelo, who was one of the camp’s mean girls, doesn’t get the lines or moments that could amount to anything. Only Josh Peck (as one of the camp employees) makes you care about him and that’s because he calls out one of the trio as she tries to control a situation.

Keaton, oddly enough, blends into the background, never quite doing her Keaton thing (outside of costuming); Woodard seems like she’s in a much darker film. And Eugene Levy as a Harry Hamlin-level hunk? Yeah, you’ll gulp, too.

Only Bates jumps in headfirst and that could be because she’s given a brassy red wig and that oh-so-noticeable bus.

Directed by Castille Landon, “Summer Camp” needs some of the zaniness that even “Poms” (an earlier, equally weak Keaton film) had.