There will be a lot of inefficiency in your group today: everybody is following their own whims and losing focus on what would be best for everyone. You see this, so you have an obligation to help others see it, too. Step up and take control. Point people in the right direction, give them an objective, and delegate responsibilities. Being a leader is something you are quite skilled at, even though it isn't always your favorite thing. But being the grownup is necessary sometimes.