Club Girls Book 2 by Tamara Hart Heiner

When Cassandra and her two best friends decide to start a club, she realizes it's going to be harder than she thought. She tries to hold it together as she and her friends weather parents who don't want to drive them places, vicious dog attacks, and petty cat fights. On top of that, Cassie is still trying to convince her mom to add a new pet to the family.