The Rotters' Club by Jonathan Coe. This book is not for me. It's set in a particular era of the mid-70s which I lived through and reminds me of the less marvellous aspects of it. I think it's more of a bloke's book.
Lily Koppel's The Astronaut Wives Club: A True Story details the real-life friendship of the wives of the Mercury Seven astronauts, covering everything from their tea with Jackie Kennedy to their present-day connections more than 50 years later.